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ubavontuba
http://www.physorg.com/news12171.html

Is this safe?
rpenner
Um, "Don't cross the streams?"

Don't stand next to the particle accelerator.

But if you mean, "is it safe for the universe" there is no evidence that experiments at this energy level (quark-gluon plasma) will lead to a destabilization of the laws of physics by a restoration of the broken symettry which superstring theory believes to be frozen into the universe at a early stage.

Earlier, when gold nuclei were used in a earlier high energy experiment, some uninformed people protested that we destroy the solar system, but such high energy collisions already happen in the wild, with no detectable ill effects.

If you mean "is it safe for the environment" our best studies of gravity indicate there is no chance of a black hole of any type being formed.

Old link:
http://www.phys.utk.edu/rhip/Articles/RHIC...rhicreport.html
blue_bottle
The creation of this "quark-lepton" soup is essential if we are to understand the fundamental internal mechanics of a black hole, and most probably even the early universe.

Everything physcists do nowadays is dangerous to some un-learned mind. But we must carry on regardless.

Let's continue having fun and blowing things up! biggrin.gif
ubavontuba
QUOTE (rpenner+ Mar 29 2006, 07:35 AM)
but such high energy collisions already happen in the wild, with no detectable ill effects.


Sure, but aren't these natural collisions fundamentally different in that they would tend to have very high relative velocities with the earth/solar-system whereas the CERN collisions would have no, or little, relative velocity with the earth?

QUOTE
If you mean "is it safe for the environment" our best studies of gravity indicate there is no chance of a black hole of any type being formed.


Yeah, that's the most likely outcome. But what if?

QUOTE (->
QUOTE
If you mean "is it safe for the environment" our best studies of gravity indicate there is no chance of a black hole of any type being formed.


Yeah, that's the most likely outcome. But what if?

Earlier, when gold nuclei were used in a earlier high energy experiment...


Supposedly, there is an indication that a gold nuclei collision already resulted in the formation of a blackhole. See this article.

Obviously, it would take a lot of time (perhaps billions of years) for a single micro-blackhole to do significant damage to the earth (if they're stable), but CERN is expecting to make thousands of them at the rate of one per second. Should we worry?
ubavontuba
QUOTE (blue_bottle+Mar 29 2006, 07:44 AM)
The creation of this "quark-lepton" soup is essential if we are to understand the fundamental internal mechanics of a black hole, and most probably even the early universe.

Everything physcists do nowadays is dangerous to some un-learned mind. But we must carry on regardless.

Let's continue having fun and blowing things up! biggrin.gif

I hope you aren't a nuclear physicist. You sound positively dangerous.


blue_bottle
QUOTE (ubavontuba+Mar 31 2006, 06:28 AM)
QUOTE (blue_bottle+Mar 29 2006, 07:44 AM)
The creation of this "quark-lepton" soup is essential if we are to understand the fundamental internal mechanics of a black hole, and most probably even the early universe.

Everything physcists do nowadays is dangerous to some un-learned mind. But we must carry on regardless.

Let's continue having fun and blowing things up! biggrin.gif

I hope you aren't a nuclear physicist. You sound positively dangerous.

You know me so well!
Burncycle
That's cool maybe they will just wind up blowing themselves up and we won't have to worry about it no more. I mean it's obvious to a educated and non educated mind alike that they don't know what they are doing sense the honestly don't know what's going to happen when the flip the switch I just hope it destroys them before they destroy all of us.
Burncycle
I have an even better Idea why not create a particle accellerator that collides people then all the scientist could jump in and get an even closer view of what happens. lol
homo sapiens at risk
ph34r.gif the cern found it would make black holes when it had already spent 4 billion dollars. The honest thing to do is to stop the experiment. According to relativity a black hole will tear off the electromagnetic membrane of our Universe and dissolve it into a quark mass, the experiment at RHIC where scientists expected a gas and found a liquid far more stable is worrisome, with more energy it will be more stable. Hawking's radiation doesnt evaporate black holes but feeds it. hawking is the typical example of modern pathological physics that doesnt respect logic, the science behind maths that have to be correct, in his 1977 article it makes some obvious logic errors (below), before his beautiful math, it breaks with the principle of causality and creates the information paradox, that doesnt exist. It is a hoax, a bogus... That is why we never observed it. Cern should be responsible, and accountable on the La Hague court of human rights for an experiment whose risk is much higher than his assessment. In legal terms it is a genocide (risk x population) of at least a million people. The ball is growing and it will harm the prestige of physics for years to come. Down the article quite ironic given the stakes involved on Hawking's hoax. Any scientist knows that when a theory is not logic and besides has not proves is false. We cannot rely the future of mankind in a hoax. Fundamentalist physics is as dangerous as any othe form of fundamentalism.
On the falsety of the argument that black holes are cosmic rays;
The argument of cosmic rays is undoubtedly convincing for people who do not know anything about physics and that is why it is put there. The simple answer was already given by our common sense writer at www. . If a particle with more energy than those of CERN has not produced black hole or has produced them and those black holes didn’t eat the Earth, nothing CERN can do will eat them up. However the argument is totally false because the reproduction of a new particle is quite similar to the reproduction of a new cell: it require the merging of two previous equal particles, whose space-time coordinates are opposite, as a new cell is born by the merging of two DNA codes with opposite ‘sexual orientation’. Take the case of a new-born electron. Two electrons looking at each other in opposite directions can create a baby-electron emitting a seminal ray of light, the cellular element of which electronic clouds are done. Maybe that analogy with living beings is too far out for an abstract scientist but it gives you a clear image of the processes involved: cosmic rays are lonely particles which enter the atmosphere at the speed of light, most often mere protons, hydrogen or helium atoms, at best an iron atom with far less weight and hence mass than the ultra-heavy gold and plumber atoms used at CERN. A lead atom has 207 times more mass than the protons and electrons that make up cosmic rays. And the creation of a black hole is precisely about packing as many quarks as you can in a tiny zone of space-time where their density will bound them together into a liquid or solid state which will become precisely stable given the huge mass of quarks bonded… How many of them are needed to form a stable black hole we do not know. The 4 thousand that might had lumped together at RHIC were almost enough. So it might be 10.000 as the Universe seems to work in decametric scales. If so, it is very likely that CERN creates the stable black hole. If we are very lucky and we need 100.000 or a million quarks lumped together we will have to wait till the next generation of super-colliders a few years more, but still the risk will lark there.
But there is more about that false cosmic analogy. In CERN the nuclei of lead will be precisely fine tuned to stomp on each other at near light speeds in such a manner that both balls, like in a billiard game will become static, break their cover and merge their bits into a gluon-quark liquid. This might seem easy, but given the size of those atoms it is the finest precision work ever assembled by human beings, since any other bull eye's shot as in a billiard game would not stop the atoms in a point of space-time at rest, the condition needed to create a black hole, which is a point of infinite mass in its center, that is a point without movement, that moves the entire Universe around him.
This is totally different from the cosmic ray which moves at the speed of light, has a billionth of probabilities to hit exactly the other ball in a way that it just not communicates his speed and parts away as any other type of billiard combination will do. Further on, on the Earth all the cosmic rays that enter the atmosphere hit light atmospheric atoms or electronic clouds, loosing its energy and dissolving into a shower of rays. So the obvious conclusion is that the chances of an ultra-heavy atom hardly ever observed among cosmic rays that come from exploding stars made of iron, carbon, helium and hydrogen, hitting an ultra-heavy atom on Earth without dying away by friction with the atmosphere is basically null, far smaller than the downplayed predictions of CERN regarding black hole tragedies on their lab. More over, the energy of a head to head collision is far stronger than the one developed by a near light speed cosmic ray hitting a fixed target. For example, a collision of particles head to head at an energy of 270 GeV per beam is equivalent to a beam of 150.000 GeV striking a stationary target, around 600 times more energetic.
The conclusion is obvious, cosmic rays are basically single, accelerated light protons that never will become black holes but explode into lesser particles; while black holes are static very dense lumps of quark matter that can be produced perfectly by the stationary collision of 2 particles in a single point of space-time.
In fact during the past 2 years in Argentina scientists set up a very refined detector system of cosmic rays and never found any evidence of a black hole, or anything similar to the quark-gluon soup we observed in RIHC, which not only shows all the properties of black holes albeit in a subdued manner, but proves an old theory supported by most of us, cosmologists that observe black holes in the Universe: the concept that the big-bang, the origin of the Universe or at least the different galaxies that inhabit it, is merely the final death and explosion of a black hole that has absorbed all the matter of the galaxy or the Universe. Or in terms anthropomorphic humans can understand: we are not the most intelligent, neither the center of creation in the Universe, black holes are. They are perfect, super fluid, superconductive, super dense organic systems of quarks in the so-called ‘bosonic’ highly ordered state of maximum information and energy, whose flexibility in size ranges from the minimal to the maximal size of the entire Universe. In fact, cosmologists have calculated that the entire Universe has a density similar to a gigantic black hole… To put it in simple terms, the Universe breeds black holes of all sizes, not human beings. We haven’t seen any human being or intelligent race in the galaxy. But we have seen black holes all over the place, 90% of the Universe seemed to be a kind of cold, slow moving matter, exactly like black holes are, ultra dense, very slow moving, cold matter that grow feeding on stars and very likely feeding planets… In organic terms, which are much more descriptive than mathematical equations, when the matter is a question of life and death, we are like primitive apes that invite a lion to his cave.

On Hawkings false radiation
Mr. Hawking’s kind of physics.
What moves all those researchers is his desire to emulate Mr. Einstein, the tribal idol of XX century Physics. Now Mr. Einstein had indeed many defects. He was not exactly a nice guy. He gave his first son on adoption and did not even mentioned him in his autobiography; he told his wife that women only reproduce ideas when she, a competent physicist, tried to help Einstein on his work, etc. etc. But certainly Einstein did not need to make 8 billion dollar experiments to find out his equations, but made ‘thought experiments’ as he knew perfectly that physics is basically a mathematical description of the Universe and once enough data had been recollected, and we have indeed enough data, no amount of experiments will substitute the hardcore work of resolving and simplifying the mathematical equations that explain the Universe. The problem of those particle physicists is that they don’t seem to have the mental power to resolve and simplify further what Einstein had achieved, so they fancy with the idea that Mr. Einstein was wrong and they are right, just because they want badly to occupy his notch. This arrogant sense of emulation is especially obvious in Mr. Hawking, the wannabe genius that CERN considers the oracle which all human beings have to trust in this matter.
Indeed, Hawking’s sets himself in his famed article also to a task beyond his capacity: to marry quantum theory and relativity outdoing the master Einstein by substituting his solid work for his speculations. In fact, the 1977 article () starts with Einstein’s famed quote that ‘God does not play dice’, which Mr. Hawking will dismiss in his failed attempt to refound modern physics at the end of the article affirming that ‘God not only plays dice but sometimes throws them where they cannot be seen’ (in the interior of the black hole). The ambition of the article is self-evident, Mr. Hawking is about to tamper with quantum mechanics, Relativity and Thermodynamics, the 3 pillars of western science in order to create his own branch of what some ironic physicists call ‘Hawking’s Physics’…
Indeed, from the beginning of his article Mr. Hawking leads us with astonishing ‘chuptzah’ to where he wants to arrive. If black holes evaporate, Einstein is wrong, because his General Relativity affirms that no energy or matter below the speed of light can abandon a black hole. Again quoting Mr. Hawking on that article’s first page: ‘According to the special theory of relativity nothing can travel faster than light, so that if light cannot escape nothing else an either. The result would be a black hole, a region of space-time from which it is not possible to escape.’ But he is going to prove Einstein wrong very soon with Hawking’s physics. To that aim he makes an analogy between 2 concepts that have no relation whatsoever in ‘classic physics’: the surface area of the black hole and the temperature of an object, breaking one of the fundamental laws of serious science: ‘analogies are not homologies and hence can never be adduced to draw conclusions upon the equality of two facts of nature’. Let us put one simple example. The similarity between the bat’s wings, the bird’s wings and the plane wings is an analogy. They look analog because they have similar uses, they are all tools for flying. But that fact doesn’t mean that birds, bats and planes are homologous, are the same thing and proceed from the same ancestor.
Now the area of a physical object is a static, spatial concept which easily applies to black holes. The temperature of an object however has nothing to do with the area. Certainly is not an homology and many would say not even an analogy. But Hawking’s decides that because the black hole area increases constantly as the black hole grows in mass (in the same way a new baby grows in mass as he eats more), and the entropy (or temperature disorder of the Universe) also grows constantly, both things are the same. This is total nonsense. All things die certainly at the end of life and that doesn’t mean they are the same. Birds, bats and planes also become disordered as time passes and yet nobody would think that their processes are the same, or even that they eat the same fuel. And yet based in that analogy Mr. Hawking and those who followed on the path of his speculative science, deduced that as hot bodies release heat and energy, black hole surfaces had to release also energy and evaporate. And so they have to be very hot.
Birds do not transport passengers even if they have wings like planes do and black holes do not need to release energy even if they have an area that increases with time as entropy does. Mr. Hawking himself affirms in the article: ‘although there is clearly a similarity between entropy and the area of the black hole horizon it was not obvious to us how the area could be identified as the entropy of a black hole.’
Still, though the analogy doesn’t hold, Mr. hawking needs it because temperature is a quantum effect he can study with quantum equations and the area of the black hole is a spatial effect that he has to study with Einstein’s Relativity and hence could not marry both effects together.
But we will be generous here and concede the analogy, as we have conceded it through the text, warning the readers of its truly meaning. What the analogy means is that a small black hole is hyper-active because his gravitational field cancels around the strong force, the Russian doll cover of the proton, and feeds on its inner quarks as boiling water peels off a tomato and allows you to eat the interior. Son in a sense, we concede that black holes are hyper-active, and accept the analogy as a working simplified method of explaining to you what happens next, according to Einstein and Hawking (through his analogy): the black hole increases his area as it expands its gravitational force in our universe. This Hawking’s concedes without realizing that he is breaking another basic logic law of true science. If A implies B then A doesn’t imply non-B.
It is what a high school student knows as ‘reductio ad absurdum’. Indeed, Hawking invents here an absurd argument, as he affirms that black holes grow constantly in volume and area, which means they are feeding ‘growing, in size’; and yet he affirms that black holes evaporate; that is, they ‘diminish in size’… Hence if you believe in logic, the backbone of all sciences, either black holes do grow constantly in size as entropy does, and so they don’t evaporate but feed as Einstein says, or they evaporate and so Mr. Hawking own 1st law of black holes, the unrelentless growth of their area is false… What they cannot do except in pathological physics is to grow in size and evaporate at the same time, as we cannot live and die at the same time, and white is not black and red is not blue and A is not B but A.
Of course Einstein is not God, but the Greeks called God, Logos, the Logic of the Universe and here we find a man who plays to reinvent the Universe. Of course we want to go beyond Einstein… But most of us merely became humbled when learning the complex equations of Mr. Einstein and tried at best to simplify and correct his equations, not to throw them to the garbage with 100 years of serious science behind (3). Not so Mr. Hawking who can wrestle with the Logic of the Gods, like a Quixote tumbling wind mills that never fall except in his imagination…
Of course he is fair so he doubts of himself, sort of apologizing for his bad physics, which might look to you a nice fellow attitude but has nothing to do with the search of truth, which is either A and B but not A perhaps, if…
Not so in Hawking’s mind, ambivalent between brashness and apology, when he affirms: ‘according to classical concepts no such (thermodynamic) equilibrium is possible, since the black hole would absorb any thermal radiation that fell on it and by (General Relativity’s) definition would not be able to emit anything in return’…
Yet he is not convinced since he is in words of his best friend Mr. Thorne () ‘the most stubborn man I ever known’… and his goal is obvious: to put aside General Relativity and bring in quantum theory, studying black holes with the temperature analogy instead of doing it with the gravity field as everybody else does since Einstein, Schwarzschild, Chandra and Oppenheimer discovered them theoretically.
Problem is that quantum theory and temperature are theories that study electromagnetic particles and fields unrelated till date to gravitational fields and general relativity the classic theories that explain black holes. So in the same way we do not use sociology, a theory about human beings, to study the behavior of electrons, for whom we have quantum theory, we shouldn’t use quantum theory to study black holes, for whom we have general relativity… Mr. Einstein himself tried unsuccessfully as many of us have tried after him, to marry quantum theory and relativity (in the opposite way to that of Hawking’s obviously, departing not from quantum theory but from Relativity).
But Mr. Hawking, well known by his iconoclastic remarks, is about to do it in his article. And so he studies quantum effects around the black hole.
You are probably familiar with the idea that every thing in the electromagnetic Universe has 2 states as a particle and a field of forces, which is like saying that things can be clumped into a ball or extended into its smallest elements. So particles can gather all his field in a ball (a mass if the field is gravitational, a charge if it is electromagnetic), or extended as if they would iron the mass of the ball in a long sheet. This happens constantly in the Universe, where electromagnetic sheets, the fields, fluctuate between particle and wave state.
So the vacuum space we see is basically an electromagnetic field of energy that constantly fluctuates, aggregating its spatial energy into clumps of mass called particles, mainly photons and electrons…
Those fluctuations happen in the electromagnetic field around a black hole as they happen around you. But you do not evaporate because those quantum particles are produced outside not inside your body. While the sweat that could evaporate and take away mass from your body is created inside your body.
So it happens in the case of the black hole: the sweat of electromagnetic particles is produced not inside the black hole but outside in the electromagnetic field around the black hole, creating pairs of particle-antiparticles, which mainly feed further the black hole as the rain that falls around you moistens your skin…
This again is obvious, but with the use of a lot of messy equations and paradoxical arguments (which in logic are called merely absurd arguments), Mr. Hawking affirms that photons are not born from the outside electromagnetic field but from the inside gravitational field of the black hole, taking energy from it. Again this is an absurd. Pears are not born of apple trees but from pear trees as much as electrons and light are born from electromagnetic fields, while the black hole is a knot of gravitational force that feed mainly of the heaviest particles of matter, the quarks we saw at RHIC…
How then the particles created outside the black hole can come from inside the black hole? It is worth to quote again Mr. Hawking because here he outdoes himself:
‘Another way of looking at the process is to regard the member of the pair of particles that falls into the black hole – the antiparticle, say – as being really a particle that is traveling backward in time. Thus the antiparticle falling into the black hole can be regarded as a particle coming out of the black hole but traveling backward in time. ‘
Yes. Mr. Hawking now is breaking the absolute law in which all science and reasoning except fundamentalist religion is based, the law of causality between past and future, which only Saint Augustine denies as only God should have the power of changing the flows of time.
Now, antiparticles come with negative time coefficients in some equations, which are, as the negative imaginary numbers of quantum theory, a formalism that latter we will explain in terms of ‘evolutionary time’. Enough to say for now that any quantity changed side in an equation acquires a negative symbol, but that doesn’t mean they travel backwards in time: merely they have inverse symmetries to the particles of our bodies. Further on, since the electromagnetic field becomes a couple of particles, and any of them can randomly feed the black hole there is no reason to believe that it is the antiparticle, not the particle which falls into the black hole. Any of both particles might fall, and the fact that we see massive radiation of energy around black holes is indeed a prove that 50% of those antiparticles probably annihilate with the particles of our side of the Universe, creating the massive radiation and explosions of energy we observe in black holes.
Otherwise we might believe that there is travel in time towards the past, that black holes are time machines or even doors to another Universe… All those pseudo-physical theories indeed would be sponsored latter on by Mr. Hawking’s kind of physics and became news on the popular press, but as we saw he himself had to apologize recently affirming he no longer believes that black holes are the door to other Universes… In 1977 he was not so humble.
Hawking instead theorizes that if we were observing the universe from future to past the particles falling into the black hole would appear coming from it and hence it would seem as the black hole evaporates. Certainly. If humans would come from future to past the death would seem to resurrect. But that doesn’t mean that in the real Universe, we observe the living dead, coming from the future into the past, nor have been observed in any part of that Universe, black holes evaporating into particles from future to past. Thus it seems much more obvious to suggest that zombies do not resurrect and black holes do not evaporate from future to past but rather feed from past to future in the Hawking radiation, while the dead rest in their tombs.
Yet even if black holes evaporate energy from future to past (and hence zombies resurrect), the ratio of ‘sweat’ seems smaller than the ratio of feeding, as a man who drinks water to replenish the one it sweats or an entire community that reproduces more babies than zombies resurrect.
Those facts are so obvious that in the old, more strict age of serious Physics, before Hawking and others broke with the basic epistemological laws of scientific truth (simplicity or Occkam’s razor, and logic veracity or principles of non-contradiction and causality), it would have taken a few minutes to dismiss Mr. Hawking’s work. A far more profound Unification Theory of quantum relativity by Mr. Weyl, was dismissed by Einstein with a simple letter. And Weyl complied.
But in an age of showmanship, physical bizarre theories of 11 dimensions, baby universes born in black holes (according to Mr. Hawking), and other niceties, it often deserves more attention one of such fancy theories that the serious, real equations that describe what we experience. And when we study those serious theories on black holes, all of them affirm that the black hole will grow exponentially and swallow the Earth. The only reason CERN has to adduce that this wont happen is Mr. Hawking’s radiation coming from the ‘future into the past’ (and hence perhaps evaporating us tomorrow as a sweat that appears as manna in the Holy Desert of the mythic age of human thought?)
ph34r.gif
AlphaNumeric
^ Learn some physics, read something newer than a paper Hawking wrote in 1977, learn how to use paragraphs and either stop drinking so much coffee or using meth or whatever you're on so to make your posts shorter and more to the point.

As an example :
QUOTE
According to relativity a black hole will tear off the electromagnetic membrane of our Universe and dissolve it into a quark mass
Relativity says nothing of the sort because relativity doesn't talk about quarks or an electromagnetic membrane.
Eric England
I read the whole thing. You did use paragraphs, just not a hard return between them. That would have been a nice touch, though. It's called "white space" in advertising.

A "super pair" can be found just as easily with logic. Hell, you can even see past them. Me thinks these boys just like their toys.

I've used this quote many times on this forum and for good reason.

"Reality is merely an illusion, albeit a very persistent one." – Einstein

If they would just spend all their time trying to understand this one quote, and why they "persist" in thinking that's it's somthing other than an illusion, we wouldn't have to put up with all this "physical" nonsense, and begin to truly understand the universe.

Cern is physical nonsense. Very costly physical nonsense. Maybe more costly than money and time.
homo sapiens at risk
ph34r.gif Alphanumeric, i am one of the world leaders in my scientific discipline, so i have no need to learn what i know, neither i should impose with authority reasonable logic statements, rather remain anonymous. Since I believe as Einstein said that 'those who try to impose truth with the tools of power will be the laugh of the Gods'. So i have in my post only appealed to reason on the hope people here still believe in the true meaning of science, which is to explain rationally not with myths and absurds, the nature of the Universe, and improve human life.

But CERN uses 'authority', arguments that look good to ignorant journalist to defend his tool of power, and a huge economical undertaking. He doesnt provide what we should expect here, when other's people life are involved, without its express permission: sound, definitive arguments that the chances of a genocide are non-existent. They are indeed brief in their dismissal of a very complex subject that should be openly debated: 'black holes will evaporate by thermal process'. Point. 7 words seems enough to dismiss a real danger for the well-being of all of us. The theme on my view requires all the pages and detailed reasonings to exhaust the matter. Instead, it has merely invited Mr. Hawking to validate the experiment in his recen tour, in yet another of the so-common public relations strategy to uncover misdeeds, which we see happening every day in companies, politics and now unfortunatelly what used to be serious, hard science.
If all what you have to contradict my long, thoughtful prove of Hawking's hoax is that sentence, plus some 'style' not content errors, it is obvious that you have accepted my thesis. Respect to that sentence, I concede that at the time of einstein's work quarks had not been discovered. But the collapse of our space-time electromagnetic Univese by a black hole, which is what I explain here was proved by Karl Schwarzschild almost one hundred years ago. And no physicists have ever proved him wrong. ph34r.gif
AlphaNumeric
QUOTE (homo sapiens at risk+Oct 27 2006, 09:55 PM)
ph34r.gif Alphanumeric, i am one of the world leaders in my scientific discipline, so i have no need to learn what i know

Which scientific discipline and care to explain about how relativity talks about quarks when it absolutely nothing to do with QCD? Your attempt at an answer didn't even get close to acceptable.

What exactly is an electromagnetic membrane within relativity? What has the Schwarzchild solution got to do with it, when it's the Reissner-Nordstrom or Kerr-Newman solutions which talk about charged black holes.

Why would the black hole compress an electromagnetic membrane into a quark mass? Why not a neutrino mass or perhaps an electron mass?
QUOTE (homo sapiens at risk+Oct 27 2006, 09:55 PM)
If all what you have to contradict my long, thoughtful prove of Hawking's hoax is that sentence, plus some 'style' not content errors, it is obvious that you have accepted my thesis.
No, I just don't see the need to attempt to refute what is a long rant about personal opinion of Einstein and Hawking and their personalities (which are irrelevent to their physics theories). When you do mention science, you display a distinct lack in understanding it.

Have you actually seen the derivation of Hawking radiation? The two ways I'm familiar with are euclideanising the metric and creating a canoncial ensemble and the decompositioon of a field into energy modes and considernig it's state in different points of time. Neither are frantic armwaving or blatent lies, they are both reasonable ways to approach the idea.

Yes, we get it, you don't like Hawking. Rather than just saying what a liar he is and what a nasty person he must be (though having seen him around the department a fair few times, he doesn't seem too bad a guy) why don't you type up your grievences with the specifics of his theories. If you're 'a world leader' (though you don't actually mention what field, if you're a world leader in history it's hardly relevent) and you see the problem in Hawking radiation, lets see you explicitly demonstrate it's self contradiction.

It's easier to say "You're wrong" than actually demonstrate. Cleverer people than I have read Hawking's material and found it acceptable and I've followed it (at least on the level I was shown it), so I'm not going to just accept "It's wrong" without seeing some reasoning other than "Because I say so"
ubavontuba
AlphaNumeric,

You miss the point. It's not whether Hawking is right or wrong, it's what if he's wrong?

The point is that the maths can be quite rigorous, but not necessarily applicable to reality. If this was not the case, then the "Standard Model" wouldn't need the frequent updating required by experimental evidence that was not mathematically predicted.
Turya
QUOTE (ubavontuba+Oct 28 2006, 01:43 AM)
... It's not whether Hawking is right or wrong, it's what if he's wrong?

The point is that the maths can be quite rigorous, but not necessarily applicable to reality. If this was not the case, then the "Standard Model" wouldn't need the frequent updating required by experimental evidence that was not mathematically predicted.

Really "grano sali". I couldn't agree more.

But real question is about Change. Total Change of cosmic paradigm. In this moment one and only "free way out" of the daed-end (dead-lock).
AlphaNumeric
QUOTE (ubavontuba+Oct 28 2006, 02:43 AM)
AlphaNumeric,

You miss the point.  It's not whether Hawking is right or wrong, it's what if he's wrong?

I didn't get that the reason for Homo sapiens at risk's was 'what if Hawking's wrong' but more that he just doesn't like him. Most of his comments weren't based on any reason other than "I dislike him, so he's wrong." Mostly ersonal opinion rather than any kind of sound scientific basis.

Not to mention he displayed a distinct lack of understanding of the theories Hawking was talking about. If he'd learnt them a bit maybe he'd see there isn't a huge conspiracy or it being a result of Hawking's personality.
ubavontuba
QUOTE (AlphaNumeric+Oct 28 2006, 01:43 PM)
I didn't get that the reason for Homo sapiens at risk's was 'what if Hawking's wrong' but more that he just doesn't like him. Most of his comments weren't based on any reason other than "I dislike him, so he's wrong." Mostly ersonal opinion rather than any kind of sound scientific basis.

Not to mention he displayed a distinct lack of understanding of the theories Hawking was talking about. If he'd learnt them a bit maybe he'd see there isn't a huge conspiracy or it being a result of Hawking's personality.

I'll agree with that. Personalities should be left out of it. However, he does make some interesting arguments. For instance:

QUOTE (homo sapiens at risk+ Yesterday at 2:48 PM )
This is totally different from the cosmic ray which moves at the speed of light, has a billionth of probabilities to hit exactly the other ball in a way that it just not communicates his speed and parts away as any other type of billiard combination will do. Further on, on the Earth all the cosmic rays that enter the atmosphere hit light atmospheric atoms or electronic clouds, loosing its energy and dissolving into a shower of rays. So the obvious conclusion is that the chances of an ultra-heavy atom hardly ever observed among cosmic rays that come from exploding stars made of iron, carbon, helium and hydrogen, hitting an ultra-heavy atom on Earth without dying away by friction with the atmosphere is basically null, far smaller than the downplayed predictions of CERN regarding black hole tragedies on their lab. More over, the energy of a head to head collision is far stronger than the one developed by a near light speed cosmic ray hitting a fixed target. For example, a collision of particles head to head at an energy of 270 GeV per beam is equivalent to a beam of 150.000 GeV striking a stationary target, around 600 times more energetic.


Basically, this reitterates my contention that the CERN argument; that it happens all the time naturally, is irrelevent. However, it is a point of discussion.

I recommend that you likewise attempt to keep personalities out of it and concentrate more on the logic.
ubavontuba
Regarding Hawking's hypothesis, here's what I don't get:

My understanding is that the particles and anti-particles that escape the event horizon in becoming real, are supposed take an equivalent energy/mass away from the black hole.

Why aren't the counter separated particles falling into the blackhole also considered to be real at the point of separation?
Aren't they similarly ripped apart from their pairs? Aren't they similarly antimatter and regular matter particles? How can the conserved force of gravity at the event horizon give up energy by performing this apparently catalytic action?

It seems logical therefore that the total energy of space remains conserved (even if some of that energy has been made into real mass), the mass of the blackhole remains conserved and the mass of the universe remains conserved (due to the symmetrical formation of antimatter and regular matter).

Why is this wrong (according to Hawking)?
Eric England
Damn, if they'd just made it a square, we wouldn't have to wonder about it.

I don't know if any of you are into "metaphorical analysis" (I know AlphaNumeric isn't), but Hubble and Cern are just sensing machines.

They sense what is happening in the universe and the universe only happens in a sense. Hubble and Cern only exist in a sense.

What we are concerned with, is that from our perspective, what happens in a sense seems to be real.

As has been said, "you can kick a rock and feel the pain, but did your foot actually touch the rock"?

Cern will either show us that the universe is even less "substantial" than we think or it will be a disaster that a lot of French folks (amongst others) are going to be pissed about.

In either case, if we continue to believe the universe is anything other than Einstein's "illusion", he will be disappointed that we are still victims of the "persistency of the illusion", while his dream still goes unrealized.

The illusion is not opaque. One can see right through it to reality. Reality is a principle, that the illusion exists within, and only logic can see that far.

There is not one thing that is truly finite (real) in the entire infinite universe. To say the universe is finite yet unbounded, doesn't mean finite is real.

Even if we could locate an unquestionable beginning or end to anything, what would say that what it is and what happens to it is "real", in between its beginning and end?

We have to get past finite and infinite, to find something that's actually real.

An "infinite accelerator" would need to built, and I'm pretty sure that won't happen.

My solution to what Cern is looking for, is simple logic. My solution for the disaster it may cause, is to practice getting my assumptions out of the way, to allow the "particles of destruction" to pass right through my body without actually touching anything.

I probably will fail and my body will die, but that won't mean I'm not still alive.
AlphaNumeric
QUOTE (ubavontuba+Oct 28 2006, 11:01 PM)
Why is this wrong (according to Hawking)?

I don't quite follow what you mean. Why do you have a problem with the pair production due to quantum mechanics allowing for one particle to fall in and the other escape from just above the event horizon? The energy debt is paid by the black hole's mass when the infalling particle hits the singularity, so energy is conserved and an observer sees the effect of the black hole spitting out a particle.

Obviously the exact derivation is a bit more involved than that but I happen to have it in a pdf file of lecture notes I've got on a black hole course given by one of Hawking's coworkers, should you be interested in sitting it.
ubavontuba
QUOTE (AlphaNumeric+Oct 28 2006, 10:54 PM)
I don't quite follow what you mean. Why do you have a problem with the pair production due to quantum mechanics allowing for one particle to fall in and the other escape from just above the event horizon? The energy debt is paid by the black hole's mass when the infalling particle hits the singularity, so energy is conserved and an observer sees the effect of the black hole spitting out a particle.

Obviously the exact derivation is a bit more involved than that but I happen to have it in a pdf file of lecture notes I've got on a black hole course given by one of Hawking's coworkers, should you be interested in sitting it.

Alpha,

Yes, I'd be interested in viewing it (though I have my doubts as to my ability to interpret it).

Anyway, I have several problems with it.

I have no problem with the pair production at the EH. The problem I have is that the average addition to the universe is an anti-particle and a normal particle. This is the same as would appear without the BH (due to quantum uncertainty), only they'd normally self-annihilate. Therefore, there seems to be no net difference, only an apparent net difference. The mass symmetry is the same, the only difference being their distance from each other (pair splitting).

Also, It seems to me more likely that the in-falling pair should self annihilate before reaching the singularity (not affecting the singularity), and/or fall into a stable orbit about the singularity. Again, mass symmetry seems to be preserved. Even if time reversal is considered, the symmetry remains (only opposite).

To maintain symmetry and diminish the BH, it seems to me that the in-falling pair must always be all anti-particles and the escaping pair always normal particles. I don't see a way that this could happen.

What am I missing? Is it the kinetic potential between the separated pairs?




AlphaNumeric
There's no 'conservation of particle number' provided you conserve things like charge, lepton number etc. Hence why it's particle+antiparticle production.

These pairs can appear and have positive total energy for only a short time before annihilating and repaying the energy back to the vacuum. If the black hole manages to seperate the pair and fling one of them out and pulling the other one down (otherwise they'd still annihilate) then the infalling particle is basically a quantum 'IOU' for the outgoing particle. Whatever it hits it's going to make pay that IOU. Hence it doesn't matter if the black hole radiates matter or some antimatter (it'll average out to be about 50/50 I think), the infalling particle defines what the out going particle is so when it hits the black hole it removes the right amount of mass, energy, charge etc.

You can't really think of the infalling particle as literally a normal particle because when it hits the singularity it removes energy, not adds it. It's more akin to the virtual particles you'd find in quantum field theory, they don't always work in the same manner as 'real' particles.

I'll sort out the pdf tomorrow smile.gif
ubavontuba
QUOTE (AlphaNumeric+Oct 29 2006, 01:00 AM)
There's no 'conservation of particle number' provided you conserve things like charge, lepton number etc. Hence why it's particle+antiparticle production.

Right, and the net result between BH particle production and VP production is the same, except for the splitting of the pairs. Everything seems to add up the same.

QUOTE
These pairs can appear and have positive total energy for only a short time before annihilating and repaying the energy back to the vacuum. If the black hole manages to seperate the pair and fling one of them out and pulling the other one down (otherwise they'd still annihilate) then the infalling particle is basically a quantum 'IOU' for the outgoing particle. Whatever it hits it's going to make pay that IOU.


This is the part I don't get. An IOU for a particle is an anti-particle. An IOU for an anti-particle is a particle. The mass account remains balanced.

QUOTE (->
QUOTE
These pairs can appear and have positive total energy for only a short time before annihilating and repaying the energy back to the vacuum. If the black hole manages to seperate the pair and fling one of them out and pulling the other one down (otherwise they'd still annihilate) then the infalling particle is basically a quantum 'IOU' for the outgoing particle. Whatever it hits it's going to make pay that IOU.


This is the part I don't get. An IOU for a particle is an anti-particle. An IOU for an anti-particle is a particle. The mass account remains balanced.

Hence it doesn't matter if the black hole radiates matter or some antimatter (it'll average out to be about 50/50 I think), the infalling particle defines what the out going particle is so when it hits the black hole it removes the right amount of mass, energy, charge etc.


Right. And an in-falling anti-particle (in symmetry with the outgoing particle) will annihilate a tiny bit of the BH mass. However, an in-falling particle (in symmetry with an outgoing anti-particle) will add the mass right back again. Why is this wrong?

QUOTE
You can't really think of the infalling particle as literally a normal particle because when it hits the singularity it removes energy, not adds it. It's more akin to the virtual particles you'd find in quantum field theory, they don't always work in the same manner as 'real' particles.


The only thing that would make any sense of this is negative energy. Can negative energy actually exist? Is this the basis of the Hawking concept?

QUOTE (->
QUOTE
You can't really think of the infalling particle as literally a normal particle because when it hits the singularity it removes energy, not adds it. It's more akin to the virtual particles you'd find in quantum field theory, they don't always work in the same manner as 'real' particles.


The only thing that would make any sense of this is negative energy. Can negative energy actually exist? Is this the basis of the Hawking concept?

I'll sort out the pdf tomorrow smile.gif


It should prove to be interesting, but again I doubt I'm up to the task. My professional specialty is logic analysis, not extreme math. Please provide as much textual interpretation as you reasonably can. Thanks.
Robert D. Evans
wink.gif As we know gentlemen, Blackhole are a way of studying super-symmetry. Bare Vacuum (not Vacua) as expressed as Empty Space by Einstein in a question he presented in a 1937 paper:

............it would be important to know if empty space was responsible for the movement of material bodies......

Bare Vacuum and Pure matter would in a wholeness of order be 1 or 100%.

If Bare Vacuum took Hawking's imitation time as an instanton and not allowed to go from future to past, or present to past.......then, there is nothing to prove that pure matter as 50% and bare vacuum as 50% that an instantanious action was performed.

If on the other hand, 58% = bare vacuum.......and 42% pure matter, then the imbalance of energy from a wholeness of order would allow for the speed of light in nauticle miles/sec. = 16% as the difference of outcome!

161608.3932990 = naut c
fine structure (inverse) = 1/137

137 X 16 = velocity of mean/slow decaying neutron (2200 km/s)
if 1/1837 is the mass of an electron, then:

1000 magnitude added to e-mass = 1837 (range of neutron/electron mass ratio).

if magnitude is added to fine structure then .......= 1137, more exactly 1137.037037.

99.9 / .9 allowing for 1/10th of 1%:

99.9/.9 = 111...................it follows for magnitude..........111/.9 = 123.33333333,
and finally 123.33333333/.9 = 137.037037, where the present accepted inverse is:
137.0359895 +or - 61.

1137.037037 x 1.616083932990 = neutron/electron mass ratio.

A compression state continuum of (closed systems) is a decaying neutron rain is the cyclic static.......homogenious universe from finite to infinite.

To control the vacuum is to control all manifestations of physical puzzles! Think hard about this!

Your electronic friend....Bob wink.gif
RealityCheck
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Hi uba, AlphaNumeric.

I think I see where your arguments may be at 'cross-purposes'.

When you speak of the 'energy debt' to be repaid, you are referring to the usual process of virtual particle pair production 'ex vacuo' (as distinct from pair productions like elect-posit from GAMMA RAY PHOTONS etc).

The difference being that VPs revert to 'vacuo' when they 'negate' each other...whereas the elect-posit 'annihilate back to the REAL ENERGY entities from which they formed.

Here's where I think the Event Horizon 'pair production' is confusing as to what happens to the VirtualPparticles when they are separated and become REAL, so to speak.

Like uba, I too fail to see that the BH mass/energy is NECESSARILY DIMINISHED.

Let me explain:

1) first dealing with the EVENTS that will occur OUTSIDE the EH in the scenarios you are discussing.....

If a BH is 'created' from the MATTER (not 'anti-matter') that scientists say overwhelmingly abundant in our universe, then if that no-longer-virtual particle (ie, an electron MATTER) will likely survive for an indefinite period.

BUT IF that VP that escapes the EH is ANTIMATTER (ie, positron), then it will likely be ANNIHILATED through inevitable contact with the overwhelming ELECTRONIC (MATTER) in its vicinity.


The important thing to note at this point is that IN EITHER CASE, the former VP mass/energy is NOW REAL energy that STILL PERSISTS outside the EH (ie, ither as ELECTRON MATTER...OR as GAMMA RAY ENERGY.


2) secondly dealing with what MAY happen INSIDE the BH in your scenarios....

IF the 'trapped' VP is ANTI-MATTER (positron etc), then it will likely be 'annihilated' into REAL 'energy' (gamma rays) by contact with the OTHER REAL untold numbers of ELECTONIC and other forms of 'matter' that went into (and may still be going into) that BH from the 'matter-filled' universe in which it exists.

BUT IF the trapped VP is MATTER (electron etc), then that MAY persist for as long as any other NORMALLY-ACQUIRED 'matter' (ie, NOT from VP production/separation at EH) may persist in a BH.

BUT ONCE AGAIN, it is important to note that, in EITHER case, the 'trapped' particle STILL is EITHER 'matter' (electron) and ADDS MASS (or whatever it becomes inside)...OR anti-matter (positron) that soon becomes GAMMA RAY (photonic) energy (from positron annihilation with incoming NORMAL electron matter)....which again ADDS ENERGY (or whatever it becomes inside).

As uba has observed, irrespective of what 'debts' may be 'owed' to the EXTERNAL UNIVERSE, the INTERNAL mechanism for 'repaying' that debt is UNCERTAIN given what I just pointed out.

And even IF there WAS a mechanism for repaying the 'vacuo' debt, there is NO NEED to do so.....

BECAUSE THIS WAS EFFECTIVELY DONE WHEN GRAVITY GRADIENT/ENERGY SEPARATED THE TWO heretofore VP's and made them EFFECTIVELY REAL IN THEIR OWN RIGHT UNTIL EITHER ANNIHILATION INSIDE OR OUTSIDE...in the NORMAL WAY that RETAINS REAL MASS/ENERGY...which in the INSIDE case will ADD MASS/ENERGY to the BH whether or not the trapped VP was matter/antimatter.

In short: It is GRAVITY ENERGY that 'repays' the debt....NOT the BH per se. So the BH is not necessarily diminished in EITHER matter/antimatter VP particle ingestion.

Your thoughts, guys?

RC.
.
.
ubavontuba
RC,

Interesting points, but I don't perceive gravity as an energy. It is a conserved force. To my mind, in this case, it can be the cause of a catalytic action (by changing the potential gradients between the particle pairs), but it contributes nothing of itself. Essentially it is a sharp knife that the orbiting VP pair runs into. Their bond is severed, and due to the conservation of momentum law, they both proceed linearly on either side of this "knife's edge". One escapes into the universe, the other is lost to the BH.
RealityCheck
QUOTE (ubavontuba+Oct 29 2006, 06:40 AM)
RC,

Interesting points, but I don't perceive gravity as an energy.  It is a conserved force.  To my mind, in this case, it can be the cause of a catalytic action (by changing the potential gradients between the particle pairs), but it contributes nothing of itself.  Essentially it is a sharp knife that the orbiting VP pair runs into.  Their bond is severed, and due to the conservation of momentum law, they both proceed linearly on either side of this "knife's edge".  One escapes into the universe, the other is lost to the BH.



Hehehe, that's why I put 'gradient' with it!

I agree that it is not 'energy' per se, but the RESULT IS REAL MASS/ENERGY in TWO CONTEXT (in/outside BH)....hence the EFFECT at 'our level' of 'effectiveness' is to create PERSISTENT and NET ACTIVE mass/energy.

I can envisage that the 'trapped' particle continues to be ACCELERATED, while the 'escaped' particle eventually LEAVES the 'gravity well'. So in THAT sense, it is the ADDED ACCELERATION/ENERGY of the trapped particle that actually EFFECTS THAT SEPARATION in the first place. That is, even a 'sharp knife' must 'apply' SOME 'energy' in order to 'cut', hehehe.


Of course, the question of the mechanism of gravity, and the nature of the 'forces'/energies' involved, is a separate discussion all by itself, hehehe.


Good luck fellas. I will keep an interested eye open for your further discussions on this VP/EH etc aspect. Cheers!

RC.
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AlphaNumeric
Here's the derivation of the two laws of black hole mechanics along with Hawking radiation. The diagrams should be labelled but I didn't bother getting around to it.

http://www.yourfilehost.com/media.php?cat=...ile=hawking.pdf
ubavontuba
QUOTE (AlphaNumeric+Oct 29 2006, 01:52 PM)
Here's the derivation of the two laws of black hole mechanics along with Hawking radiation. The diagrams should be labelled but I didn't bother getting around to it.

http://www.yourfilehost.com/media.php?cat=...ile=hawking.pdf

AlphaNumeric,

Thanks for the pdf. It is above my head. I'll make an effort, though I wouldn't hold my breath.
homo sapiens at risk
ph34r.gif uhm i missed some comments on previous pages...specially alphanumeric quite sanguine, boy you are a crusader... and ubatuva, you look something called a common sense guy, we need more like you... respect to the schwarzschild, alphanumeric... obviously if you read the original hawking not the sci am popularization he simplifies, idealzies and uses that type of black hole, static, not rotating, never found probably non existant... in his article... some interesting concepts respect the big bang by plasma guy, to the point indeed. It is the theological complex of late physics, which is not about god and the universe but rather more local, probably a gallactic big bang (given the fact that there is no shadows), but of course you all might now that guth considers the hyperuniverse coming from a mini black hole big bang at the planck scale... now speculation is fun and i think reading hawking is fun, but we cannot risk mankind on speculation.. for decades as when eddington ridiculed chandra and nobody defended poor chandra, we have accepted hawking and his feria,common guys, he doenst write his books with his cheek people are making money, the last one thousand pages, i saw him at cern i felt bad, very bad... apart from that you cant separate personalities and work, physics is not a pure realm and critical thinking stops precisely because of emotional character... i should stop though putting this comments... my opinion on why hawking did some absurd logic assumptions... zeldovich discovered his radiation not him... if he had just assumed the logic results it wouldnt have been news... but obviously you are young, you believe people in power physics are there for the search of truth...quoting again Einstein and i like him... in all my life i have found people in this business for the sake of truth that i can count with the fingers of one hand... we are normal people and make human mistakes, we have the same petty ambitions... the problem is we have a power nobody else has... not even terrorists, we make all the weapons of the last 400 years and that is what oblige us to believe in socrates, an intelligent man has to be a good man, not in oppenheime father of black hole theory, i am dead, the destructor of worlds... outside they dont like us, and do not think it is like bush would put it because we are good and they envy us... shalom and lets hope we have more than one christmas left, its sunday and i have a family... take care all and keep talking che sera sera ph34r.gif
ubavontuba
QUOTE (homo sapiens at risk+Oct 30 2006, 03:08 AM)
ph34r.gif ...and ubatuva, you look something called a common sense guy, we need more like you...  ph34r.gif

homosapiens at risk,

Thanks for the compliment. I've always been of the opinion that physics should be explainable in commonsense language (even when it defies commonsense logic - perhaps especially then).

The static black hole thing is something I wanted to bring up after I'd done a little research. That and the Unruh radiation hypothesis.

Funny story about rotating black holes: I once posed a question to a NASA public relations science website about ring blackholes. I had independently figured out that they must form rings during the course of an investigation. They had no idea what I was talking about and accused me of being a crackpot (go figure)! I had to research it myself and explain it to them!

This is one of the reasons why this man-made blackhole thing has me so nervous. It seems the guys that are supposed to know these things are too specialized to see the whole picture.

From what I've been able to determine so far, Hawking radiation falls prey to this same in-the-box reasoning. The universe is too chaotic to to be this simple. Physicists need to learn to respect the unexpected (you'd think they'd know that by now after all the failed "Standard Model" predictions that have come to light in recent years).

String theory is a perfect case in point. Lots of rigorous math, worked on by many great minds for decades - no net results. All that work just to learn that our older theories work just as well! Is it even science when there are no observations to base the hypothesis on?
AlphaNumeric
HSAR, that derivation of the 2nd law of BH mechanics is independent of what the actual black hole is (Schwarzchild, Reissner-Nordstrom or Kerr-Newman), it doesn't take into account the specific metric form in it's derivation. Similarly, the derivation of the 1st law I have in my notes specifically includes charge and spin because you need those in order to get terms equivalent to the 'PdV' thermodynamic terms in the 1st law of thermodynamics.

The important result is that it comes out to be kappa/2pi, where kappa is the surface gravity. You can then work out the surface gravity for a Kerr-Newman black hole easily (it's 2 chapters earlier in my notes). It's known to be

User posted image

The Euclideanisation canonical ensemble is done specifically using the Schwarzchild metric but because doing the K-N one would be over the top for illustrating the method to a bunch of students. I am in no doubt someone, possibly Hawking, has done it for the K-N solution but considering we had 1 lecture left in the course, doing the simple case to illustrate how it is done is how the lecturer did it.

If you disagree with that method in general, lets here the specifics, other than "I think he's wrong".

You never did answer my questions :
QUOTE
Which scientific discipline and care to explain about how relativity talks about quarks when it absolutely nothing to do with QCD? Your attempt at an answer didn't even get close to acceptable.

What exactly is an electromagnetic membrane within relativity? What has the Schwarzchild solution got to do with it, when it's the Reissner-Nordstrom or Kerr-Newman solutions which talk about charged black holes.

Why would the black hole compress an electromagnetic membrane into a quark mass? Why not a neutrino mass or perhaps an electron mass?
If you are 'a world leader' in this area you'd recognise the name Perry (works closely with Hawking). He's the one who lectured the black holes course that short pdf is cut from (that's chapter 9 of the course). He certainly agrees with Hawking's results.

You didn't notice that the 2nd law's derivation was irrespective of the metric and also the 1st law obviously accounts for spin and charge and it makes me question just how much of a 'world leader' you are, unless your discipline is in something totally different.
homo sapiens at risk
ph34r.gif quantum space-time and riemannian geometries, alphanumeric, top 10, do your guesses, those people we are talkin about quoted by cern are dinosaurs, ok?, things move faster, and in any case black holes are not the big danger, strangelets are the previous phase of condensed matter and very likely, rhic made a ball of 4000 particles u-s-d and as per wen, thats enough A to make a cfl more stable than iron, cern will do balls much bigger, might not accrete though, thats our tiny hope...
strangelet references.

The one that says that a small ball of strangelets can be negative is: G. X. Peng, X. J. Wen, Y. D. Chen, New solutions for the color-Favor locked strangelets. Phys. Let. B633 (2006) 314-318. It is available at URL http://arxiv.org/abs/hep-ph/0512112.

Madsen invokes strangelets as a safety factor. He says that a small ball of strangelets would be positive on its surface, and so would not attract other strangelets.

Jes Madsen, Intermediate mass strangelets are positively charged, Phys. Rev. Lett. 85, 4687-4690 (2000). It is available at URL http://arxiv.org/abs/hep-ph/0008217

Madsen is one of the authors of the CERN risk study:

J.-P. Blaizot, J. Iliopoulos, J. Madsen, G.G. Ross, P. Sonderegger, and H.-J. Specht, "Study Of Potentially Dangerous Events During Heavy-Ion Collisions At The LHC: Report Of The LHC Safety Study Group" CERN, 2003 http://doc.cern.ch/yellowrep/2003/2003-001/p1.pdf

crap, and getting angry... if i write a book on this my career is over but people deserve to know, then you will too know my name
shalom and please no more questions, i cant keep writing here
ph34r.gif
AlphaNumeric
QUOTE (homo sapiens at risk+Oct 31 2006, 06:26 AM)
ph34r.gif quantum space-time and riemannian geometries, alphanumeric, top 10, do your guesses

It's easy to say that on an anonymous website. I'm actually Penrose, I just happen to have a lot of free time when I'm not kicking it in Jamacia with Hawking. rolleyes.gif

If you are that good, why can't you poke a hole in Hawking's work. Either just give a pointer like "The eikenal used for the expansion of the vector potental for light in curved space-time isn't valid becuase...." or actually show his work is flawed with some maths of your own.

If you're THAT good and disagree with Hawking so much, surely you've put some of your professional research time towards showing him wrong in a rigorous fashion? Where is it? Is it on ArXiv? Is it published elsewhere?

The quark stranglet is nothing to do with Hawking radiation, you're shifting the issue.

It would seem to me you don't like Hawking much but you can't show where he's gone wrong. It wouldn't take much work to show him wrong if you're that good and you know he's wrong. Hell, even if it takes a lot of work there'd be a publishable paper in it because you'd show the entire physics community he's wrong.

Now that I'vew pushed you into a corner saying to put up or shut up with some actual maths you're ducking out because "you can't continue to post here". Why not? Haven't got the time to Latex up some maths to show Hawking is wrong and once you've sent it off to ArXiv, post it here? Or is it because you lied about your credentials? I suspect that someone that good wouldn't post on forums like this and if by small chance they did, they'd be a) Less vindictive against Hawking, knowing the level of his acheivements, cool.gif Be more coherent and c) Demonstrate a better understanding of physics.

But feel free to prove me wrong. If you come back with a good derivation of his flaw mathematically instead of "I don't like him, he's wrong", I'll be happy to say I'm wrong.
homo sapiens at risk
ph34r.gif ha, ha, penrose , aka alpah, you keep taking it personal, cause you have no aarguments, wink.gif poking in my supossed arrogance as if that meant anything to the discussion, i could be the next einstein or a hobo, who cares... so just consider me a hobo or a hoax if that makes you happier... actually hobos might know more about the meaning of the Universe… in other speculative field called economics, the economist found that in a poll to find the variables of the future, hobos marked higher than ministries of economics and bankers… only a group made better choices…
Taxi drivers… ha, ha, the advantage of our field is that is smaller so you can feel bigger... fact is we are all equal speculators till proved that one of us is the singularity rolleyes.gif that wont certainly be found in the cern but in the mind of a thinker.. for now neither in my field or in string theory there is nothing but speculation, but of course apart from hawking who talks of GodoG… and I ad doG (since his antismetry EviL that what extincts LivE might surprise us in the hidden)…
30 years in the past, in the time of hawking, the previous generation of speculators, preferred instead of strings the subject of black holes of which there is zero evidence …except the Rhic experiment which was the first worried i had… certainly you should drop the theme of my name and go to the point, since i have absolutely no intention to put out my mask or else i could not express in freedom my emotions, which is the theme here, fear for those icare in front of irresponsability by áuthority, what seems to be your only icon...
... authority means nothing over reason alphanumeric, sorry penrose… certainly this is not the place to put up solid arguments to stop the cern, just poking on student minds, and got the conclusions i wanted... on the whole i think that most people have common sense... so do the people working at cern who make a living of it… you seem to be the only one who crusade for nothing… now my advice for your future career since you lack a full understanding on the relationship between logic and maths as per godel frege and hillbert… there has never been except for a couple of symbols Eddington found on Einstein's equations, any serious error made in modern science in the maths, but in the logic and experimental supositions made previously... you dont got the point of what is physics... It is all about logic ideas to explain experimental facts, that is causal relationships that can be expressed either logically, (as most Einstein’s Special relativity) verbally (as most Galileo’s work) or mathematically (as I happen to do)... maths add concision to the logical instruments of the mind, and the experimental perceptions, the 2 ones that add veracity
In any case the matter here it is an ethic question raised by ubatuva, which you are the only one who dont seem to get… a risk of survival not a discussion to show how clever are the maths that you have learnt in your books
And the purpose I seek is to test how I should explain in a book for cmmon people, with no maths the experiment if I write it. In any case i put you an exercise that you might enjoy, consider exactly the inverse function of the evaporation in negative time and you get the accretion rate, because that is the theme here. If you make the inverse supossitions instead of evaporating at exponential rate it will accrete as exponential rate. And we can make all kind of those supossitions. All are equally valid, since quantum gravity is still all speculation. plus we have no experimental evidence. And that is why im worried. Now, the chinese team is totally relevant on the ethic question raised by uvatuva (if you want to show how clever you are in maths open a math question on black holes), They have found 3 types of strangelets, refining our previous simple abstract vision of them, which as the 3 types of neutrinos might very likely be dynamically mutating in time, and accrete charges indistinctly. To me that is the most important article on the risks of the experiment that put them over 10%, but the CERN will not accept it,. To me however it is enough to stop the experiment but I have not written the article so i have nothing else to say. Respect to hawking the argument by which every other physicist has argued against even became cover of sci am ‘hawking is wrong, matter falls in’ is always his logic not his math as he knows those, for god’s sake he has the lucasian... but as per previous letters, math is a language, and if i say my hair is blue is syntactically correct and erroneous, so happens to all math sentences.. That is the main error of modern physics including my field, there are not 10 up 500 universes even if you have 10 up to 500 equations as there are not 500 colors of human hair, but 500 words… languages are information and information is inflationary… over the physical reality you describe in any language, in money might create even hyperinflation which is what there is now in physics, informative mathematical rhetoric, (which is the name linguistics use fo verbal hyperinflation). What really worries me is that all experimental evidence, which is what it matters, regarding strangelets and black holes implies a high risk. And indeed i do have increasingly more time for this matter, because otherwise we might not have a lot of time... and I am wondering about my future implication is this… but believers never understand those kind of risks... they die for god, and you as it seems will certainly believe in the god of mathematics… but god speaks also the organic languave of verbal evolution and that thing, seems more and more organic to mee… as I said, vey positive feed back and reassuring that i can now explain this things to a wider audience... and thanks ubatuva... for your initial post that lead me here...
In any case penrose, (=: let us both return to our work ph34r.gif
AlphaNumeric
I'll take that long semi-irrelevent rant to mean no, you can't find a problem with Hawking's work.

Sure, we can't be 100% confident in it, but for all your ranting about him and what he's done to physics and how great you are, it would seem his work can stand up to your 'scrutiny'.
QUOTE (homo sapiens at risk+Nov 1 2006, 07:52 AM)
now my advice for your future career since you lack a full understanding on the relationship between logic and maths as per godel frege and hillbert…
Wow, you can tell all that from me asking you to back up your bullshit?

I do not for a second think you're in the top 10 of quantum gravity or Riemannian geometry. You'd have easily been able to display a lot better understanding and if you wanted to put me in my place could have typed out some physics in half the time that it probably took you to type out that semi-rant (which was devoid of any understanding of physics).

You're just a crank who doesn't like Hawking (don't worry, you're not alone) but who can't actually show anything wrong with his work.
Eric England
"In the mind of the thinker" is where it all started. There was no methodology other than imagination, logic, and perseverance.

Then the methodology of philosophy was born and in turn, it gave birth to mathematics and physics.

Instead of pushing the limits of science with machines, why don't we just concentrate on using logic and imagination? They are by far, the greater machine.

When the hobo explains the universe to the barmaid, we will know we've arrived at a TOE.
mott.carl
mr.hawking is genious!
how much the space-time suffere strongest curvatures,then occur breakdown of continuities of space-time,appearing between left-handed and right -handed asymmetry of rotations,generating the curves of left-handed space-time and at the same curves right-handed space-time that go if closing,then the future is different of the past,through of non-linear structures.so in some space-time closed
curvatures,leads to send informations to the future,that are the hidden variable,that distort the space-time,and future into of past.then the presents are generated simultaneouly from past to future and vice-vesa
so in the extreme curvatures,appear the negative energy that trave negative
l space-time( these appear as holes of high-encapsulated energies,when seen by
our curvatures of space-time with definite positive metric, gravitational fields if distort to curvatures type-positive,when those negative space-time travelling negative energy sheets that if deforms through of breaking pt,that do reversion pt
to positive space-time travelling as positive energy sheets.then the gravitational deform the space-time negative to positive,through of particles that disappear with
speeds faster than speed of light,creating erosion in the BLACk HOLES,that have holes,that form differents horizons of events,with it time dilatation and contaction
of lenght occur due at differences between the curvatures topologic of space-time.
appear in those extremes gravitational fields,big quantities of particles and antiparticles that are asymmetrics,and generating branchings of curvatures of space-time;these asymmetries are given by non-linear partial differential equations with derivative multiples to the time.
homo sapiens at risk
ph34r.gif twisted penrose rolleyes.gif cross the line with his insults, and cowardly as we are not face to face, please moderate your group on that aspect ubatuva and i will keep you informing of the dangers, yes to your answer is no safe, 2 big dangers, and also 2 schools today on black holes, the mathematical aberrations of twisted penrose and the like and the experimental school of unruh's quantic liquid analogy of the new generation... on that school the fluid that falls in as in a tub, will drag more particles... but strangelets need far less energy and the chinese put the point, now with fundamentalists like twisted penrose, or money-making machines like the lhc, there wont be a public discussion... the way to go obviously is denouncing the experiment in a documentary more than a book but that as a friend puts it 'you have tried to change the paradigm for 20 years, in a very competitive ambience, now if you caution them on the lhc, they will pick on that', penrose by the way i repeat we are all speculators, the naked singularity - put some humor pliz on your post, that you discovered rolleyes.gif has not yet appeared, maybe that theorem was the only one you got right, so thats the deal, if you are interested ubatuva and moderate insults and personal bashing, ill keep talking as we are both quite con-cerned... and you twisted penrose open that group on maths and i will show you the numbers, not here ph34r.gif
AlphaNumeric
QUOTE (homo sapiens at risk+Nov 1 2006, 07:31 PM)
cross the line with his insults, and cowardly as we are not face to face

If we were face to face or I knew your name (and you could demonstrate somehow you're that person) I'd either know for sure if you were an excellent physicist, in which case I'd be polite and have plenty of questions for you about your work or you'd never make the claim about being in the top 10 because you'd lack the anonymity of the internet.
QUOTE (homo sapiens at risk+Nov 1 2006, 07:31 PM)
like twisted penrose, or money-making machines like the lhc, there wont be a public discussion... the way to go obviously is denouncing the experiment in a documentary more than a book
I asked you to back up what you said. If all you can say is "He's wrong, I'm amazing, I know" but not give any backing up then there's no discussion, it's you saying "I'm amazing, I'm right".

You're being a hypocrite.
QUOTE (homo sapiens at risk+Nov 1 2006, 07:31 PM)
lif you are interested ubatuva and moderate insults and personal bashing, ill keep talking as we are both quite con-cerned...
He isn't a moderator. Just because you start a thread doesn't mean you can edit the posts of people who post in it.
QUOTE (homo sapiens at risk+Nov 1 2006, 07:31 PM)
d you twisted penrose open that group on maths and i will show you the numbers, not here
What's wrong with typing some up and anonymously uploading it? Dodging my request it would seem.
ubavontuba
QUOTE (AlphaNumeric+Nov 1 2006, 10:44 AM)
Sure, we can't be 100% confident in it,

But in this case we need to be. There is just too much at risk (myself, for instance).
ubavontuba
QUOTE (homo sapiens at risk+Nov 1 2006, 06:31 PM)
ph34r.gif if you are interested ubatuva and moderate insults and personal bashing,  ill keep talking as we are both quite con-cerned...

AlphaNumeric is right. I am not a moderator. I actually don't know who moderates this site.

I would like you to continue posting and being involved though.

If you can do something with the maths, that would be great. It looks like the world will end long before I can (whenever that might be). My maths education is on a much more practical (read; primitive) level than this. I did find this neat multilingual website though.

I'm particularly interested in the concept of "negative energy" and how it relates to this. Isn't the most basic energy quanta a photon? How can it be negative?

QUOTE
unruh's quantic liquid analogy of the new generation... on that school the fluid that falls in as in a tub, will drag more particles...


Well, this is my take:

As I understand it, the Unruh hypothesis says something like: Blackbody radiation of the quantized fields of space is relative to the acceleration of the observers. The gravity of black holes is supposed to be a state of uniform acceleration that allows for Hawking radiation (essentially a form of Unruh radiation). As far as I know, no one has yet detected either (a worrisome state of affairs). It seems to me that if Unruh radiation doesn't exist that this bodes ill for Hawking radiation.

Here's an interesting paper that claims Unruh radiation doesn't exist. Now that would be an inconvenient truth! Where's Al Gore when you need him?
homo sapiens at risk
ph34r.gif uhm, i guess really is impossible to make the point im making... which is logic not mathematic... as it seems the structure of the scientific method is somehow missing in here... The revolutions of science are always logic, and when the logic is wrong you can write symphonies. IT DOESNT MATTER.

What looks certain beyond routine denial, after the RHIC experiment is that the mystery of what is within the black hole seems resolved: a fluid that moves at the speed of light, made of strange or tau quarks, gluons and perhaps the final, quantic components of the space-time fluid… strings.
In that sense, all black holes rotate at light speeds, in its central, cyclical singularity, communicating that rotation to the space that surrounds them. So if a black hole appears on CERN, according to Einstein’s theory, it will absorb the ‘river of space-time’ and the matter that flows through it in a vortex that reaches light speed at the mouth of the black hole sink. It doesn’t matter the size of the black hole because the river of quantic space-time according to the most recent models of quantum gravity that use the strict equations of Einstein (in its simplified Asthekar version), is as small as 10-35 m. So a micro black hole will behave as the 2 other black holes we have observed in the bigger scales of matter, stellar black holes and galactic black holes, rotating at near light speeds like a vortex of mass, sucking the electromagnetic space-tie around it. It is the accretion process of classic black hole theory, the key to fully understand what really a black hole is sucking in: the space-time vacuum, the electromagnetic space-time of our world, which is a field of electromagnetism, a field of light.
Now the radiation if it exists is far less important than the vortex, it is like the phonons of a rotating fluid. They are a secondary effect. What hawking and those do is to blow up a secondary effect, as if it were the main effect, using anothe typical erroneous tool of careless science, the ceteris paribus analysis that considers only part of the problem to make it easy and lineal and always fails in its pedictions. wWhat it matters is the fundamental property of the black hole, to be a c-speed vortex. Again the analogy error happens here, already in zeldovich which considered the black hole to spin down its rotation by analogy with a metal sphere. But again a gravtational field doesnt speed down so no radiation.
If you don’t know physics and general relativity I can put you an analogy, the vortex equation to fully grasp the essence of what the black hole vortex is.
In that sense, for a proper understanding of black holes, we have to study them at least from 3 perspectives to fully grasp its nature:
- From the perspective of a space-time vortex, as explained by Einstein’s Relativity (the quantic space-time fluid vortex analogy).
- As a material entity , packed in an extreme dense environment that has lost the electromagnetic covers of which we human beings are made (the russian doll analogy).
- And finally, as an entity,made of super fluid quarks that follows the mathematical laws of ‘far from equilibrium’, complex systems (the organic one).
The Principle of Equivalence is the fundamental principle in which General Relativity is based. It states merely that mass and acceleration are the same. Which means in layman terms that a mass is not a material form but a 'resistance' to move. A mass is an inertial force that we experience when we are pushed away, accelerated, displaced from our point of view. Things like to remain in a certain place and when we try to move them, they show an inertial mass. For example, when you accelerate in a rocket you fill pulled backwards, with more mass, trying to remain where you were before, moving at constant speed. Now, since the Universe ultimate vacuum field is an energy in perpetual movement, constant speed is ok. It is not real movement but just going with the flow. For example, the Earth moves at constant speed and we do not feel any change of position. But acceleration can always be measured against a background with a constant speed. It is a change that we feel and resist. When Einstein noticed those facts, Relativity Theory was born.
However the example of a rocket moving in a line is not good to describe masses, because most masses are not like rockets, accelerating lineally, but rather vortex-like spirals accelerating in a curved path, inwards, like the pictures we observe in accelerators. It is thus evident that as we accelerate a particle in a curved path, the particle acquires more mass, till a point in which physicists expect to create a super-massive, accelerating black hole. Since according to the Principle of Equivalence the particle that accelerates faster in an inward vortex has more mass. And that particle is the black hole, which in Einstein's words, curves the energy of the space-time continuum like a sink in a tub curves and drags inwards the water at accelerated path, taking with it whatever floats in that water... So we can explain very easily in an intuitive manner, thanks to the Principle of Equivalence, a mass like the black hole in a simple equation of 2 terms:

Equivalence Principle: mass = curved acceleration= Cyclical Vortex that resists displacement

Thus, the best analogy to understand the Einstein’s concept of a mass is that of a vortex of water ruled by the simple, fascinating equation of all vortices:

Vortex Speed x Radius-size of vortex = Vo x Ro = Constant Value

What this means is that any vortex paradoxically accelerates faster when it is smaller. So the product of its growing speed and diminishing radius is constant. And hence we find that smaller particles that rotate faster have more mass. So the electron which is bigger and rotates slower than the nucleon has less mass. In fact, the electron mass is 0.1% of the mass of an atom which is all stored in the inner quarks. While the black hole which rotates at light speed and occupies the minimal space, is the most massive form of the Universe. So dark matter very likely made of black holes represents 75% of the universe's mass. Now the vorte analogy:

Max. Speed x Min. Radius= Black Hole huge mass (the most powerful mass on the Universe) Med. Speed x Med. Radius = Quark mass (the inner world of atoms).
Minimal Speed x Max. Surface = Electron tiny mass (our world)

Again this is intuitive. If you are a very small being turning at full speed it will be very difficult to push you away. When you see a skater in a ring, he speeds up and closes his arms, to move faster and become more stable in his position. Thus the homology between acceleration and mass defines for a curved space the meaning of a mass and the paradoxical fact that the smaller the vortex is the faster it turns, and the bigger the mass is. It is the same that happens in any stream dragged by a vortex like a hurricane. In that sense what you experience as weight is the inertial resistance of a vortex anchored in a point of space-time to any displacement. The same happens in our macro-Universe when a skater turns around and bends his arms to spin faster. If he opens his arms spreading his vortex it decelerates and becomes easier to move in a lineal direction… It is in those terms how it becomes easy to understand the different masses of different particles, related to their angular momentum: the electron which turns slower in a wider circumferences is far lighter than the proton that turns faster in a smaller space, which is lighter than the black hole which turns to the limit of speed of our World, the speed of light, the substance of which our electromagnetic Russian doll is made. And vice versa: The opposite type of movement, the lineal movement of a ray of light, is massless because it has no inertia to remain in a given point. It doesn’t create a circle retuning to the same place but always moves ahead. That is why lineal particles in movement display minimal mass and light has no mass at all. Today, the previous picture of a vortex of space-time dragging masses into a black hole has become a common place in analogical research of black holes to the point that physicists study them in comparison with a fluid falling into a wave.

Now, for the negative energy the vortex analogy is excelent.But it is obviously more speculative. It means very likely beyond the event horizon the acceleation keeps going and you enter a zone of faster than light speeds, which s the meanign of neaative energy, that reaches in the inner region of the ring-singularity (Kerr black holes, the only observed), a negative gravity zone, which means probably an expansive space-time region that shoows out through its axis, creating the quasar kind of flows at hypeluminal speeds we see in the Univese. In othe words, the black hole cleans up this Univese, accelerates quantic space-time beyond light speed and shoots it out to the intergallactic space, provoking the expansion of space-tiem of the Univese (as faster than light space-time would be seen from a fixed observer). In quantic space-time models though you can build up a far sounder cosmology based in those analogies and local big-bangs (each galaxy a big-bang), as Hoyle tried and I have been doing lately. It is far more humble and puts physics where it has to be, in the limited vortex of this galaxy that becomes then a godel vortex of increasing information, quantized by a halo of black holes, that redshift light.
To point of course, that the previous analogies will be contested by many others, because again we are all speculators in models that cannot eve be verified. I work though in the opposite field of speculation that penrose and hawking, trying to simplify and make logic in a search for a unification theory, the equations of modern physics. They as mathematicians fancy into making them more complex and inventing things that are not needed. To me we do not need a higgs particle, because mass is a single vortex, a monopole if you wish and the higgs particle is not logic (a huge mass that interacts with everything else even tiny electrons). This is what the cern is looking for and his theoretical excuse... which is what alpha will tell you about my 'rants' For me though, the previous analogy explains mass and equivalence much better. But that is part of 'my' continuous search of a theory of unification, as radiation is part of Mr. Hawking’s own TOE. Neither of both us has been yet globally accepted… And so the world should not take risks on the 400 (and i might miss some) alternative TOEs i have counted. In any case my purpose is to explain in a book/documentary with the simplicity of this post very complex concepts, because to me that is the genius of the bottle, Special relativity was so simple that a 6 years old can understand it (I did that with Asimov’s guide to science at that age and decided to get this work, had I had to understand the Riemann topographies of penrose’s twistor then I would have become a fisherman ;-) I want at this point of my career be the hobo that explained the Universe to the maid, and she is actually giving me much better suggestions that hawking and penrose and the barroque epicycles of their ptolomeic systems. Theory should remain theory. Life is always the higher good ph34r.gif
rpenner
Actually, Hawking Radiation seems similar to Unruh Radiation, and both, I think, were derived semi-classically, without any assumptions of quantum gravity. Unruh Radiation I think was named in terms of Hawking Radiation, and the concept I taught is closer to the "thermalizing bath" below. In Hawking Radiation it is basically the whole of the exterior universe which is the test particle, so I think it's still as valid as ever.

G. W. Ford and R. F. O’Connell, “Is there Unruh Radiation?”, Phys. Lett. A, 350 , 17 (2006).

http://arxiv.org/abs/quant-ph/0509151

QUOTE (Abstract+)
It is generally accepted that a system undergoing uniform acceleration with respect to zero-temperature vacuum will thermalize at a finite temperature (the so-called Unruh temperature) that is proportional to the acceleration. However, the question of whether or not the system actually radiates is highly controversial. Thus, we are motivated to present an exact calculation using a generalized quantum Langevin equation to describe an oscillator (the detector) moving under a constant force and coupled to a one-dimensional scalar field (scalar electrodynamics). Moreover, our analysis is simplified by using the oscillator as a detector. We show that this system does not radiate despite the fact that it does in fact thermalize at the Unruh temperature. We remark upon a differing opinion expressed regarding a system coupled to the electromagnetic field.


QUOTE (VII. CONCLUDING REMARKS+)
A system undergoing hyperbolic motion through a zero-temperature vacuum experiences a finite temperature, the Unruh temperature (3.6). This was pointed out by Davies [1] and Unruh [2]. Our explicit calculation for the scalar electrodynamics model verifies this for an oscillator in hyperbolic motion. The effect is real: the moving oscillator is in an equilibrium state identical with that of one at rest at the Unruh temperature, with a corresponding distribution over excited states.
emphasis added

You will have to grab the article if you want to follow the argument that the test particle does not radiate.
ubavontuba
QUOTE (rpenner+Nov 2 2006, 11:08 PM)
Actually, Hawking Radiation seems similar to Unruh Radiation, and both, I think, were derived semi-classically, without any assumptions of quantum gravity. Unruh Radiation I think was named in terms of Hawking Radiation, and the concept I taught is closer to the "thermalizing bath" below. In Hawking Radiation it is basically the whole of the exterior universe which is the test particle, so I think it's still as valid as ever.

I don't buy that. If Unruh radiation doesn't exist in the quantum field, then it seems to me that Hawking radiation (which uses the same quantum fields to radiate) can't be real either.
homo sapiens at risk
ph34r.gif ubavontuva, do you live in America? I decided to write the book and talked to people who made a doc with me years ago... might need collaborators... do you have a private email? i cant give you mine after all the indiscretions mad.gif i put here rolleyes.gif ph34r.gif
Euler
QUOTE (homo sapiens at risk+Nov 3 2006, 07:45 AM)
I decided to write the book and talked to people who made a doc with me years ago.

Stop it! My sides are splitting!
homo sapiens at risk
ph34r.gif Ubatuva, the argument will be eternal, action is needed outside the scholar realm. The job is for real… but only if you are in Cali... Will be done in LA. It would be part time... you or some one con-cerned there can write me at homo@europe.com


And for Alpha and Euler… as they need 'names' to belief...

‘The only harmonious sounds I have ever heard in an assembly of scholars are the farts of their asses’. laugh.gif
And this other:
‘It will be born exceedingly small but it will grow enormous
in no time. It won’t spare any created being, since it is
in its nature to transform all what exists in its own essence.’ unsure.gif

Leonardo, Prophecies.

‘Our current theories simply aren't good enough to let us tell for sure one way or the other. As long as I'm disclaiming, let me add that the entire subject of black hole evaporation is extremely speculative. It involves figuring out how to perform quantum-mechanical (or rather quantum-field-theoretic) calculations in curved space-time, which is a very difficult task, and which gives results that are essentially impossible to test with experiments. Physicists *think* that we have the correct theories to make predictions about black hole evaporation, but without experimental tests it's impossible to be sure.’

Berkeley University web


‘’Every theory is speculative. If however a theory is such as to require the application of complicated logical processes in order to reach conclusions from the premises that can’t be confronted with observation, everybody becomes conscious of the speculative nature of the theory. In such case an almost irresistible feeling of aversion arises…’

‘E=Mc2‘

‘I do not need to do technical experiments,
I do thought experiments.’

Einstein, father of modern Physics.


‘Black holes evaporate… Einstein is double wrong’ 1977
‘We never found a black hole evaporating. Pity, if we had
found one I would have received a Nobel Prize.’ 2005

Hawking speculates on why making black holes will be safe.

‘Stephen Hawking was wrong.
Matter goes in. Answers come out.’

Cover Sci. Am. Nov. 2004

And my problem with hawk is not personal is bio-ethical. He should be ethic and responsible and say in public that he doesn’t want to be the excuse for cern, that is that he is not sure.... But for that he needs to have the thirst of life many other humans have, and im afraid he is like a child living in his unreal world for obvious reasons, so he doesn’t care. Because he is the only guy, given the entire confidence the cern has put on his theory, that can do it. And he wont do it. So he looks more and more like teller to me, a mediocre theorist that wants to see the ultimate weapon for personal reasons. The real problem of mankind are the ‘nice guys’ that behave like spoiled children and have power, from Caligula to our president. They are irresponsible elephants stomping on a very subtle, Darwinian, cruel but just universe... ph34r.gif
AlphaNumeric
You think that Hawking has forced the people who run CERN to build the LHC? That none of them have looked at his work and gone over it? That none of them have built more onto it?

They aren't doing it because Hawking wants a Nobel Prize and has forced them to, they are doing it to further science in the area of the Standard Model and to look for 'New Physics'. Just yesterday I attended a seminar by someone who was outlining how much the LHC would decrease the uncertainty in things like the mass of the W+ boson. It's for MUCH more than Hawking's benefit. Infact, it'll only be for his benefit if they actually do manage to make a black hole, which is very very unlikely.

You seem to think Hawking has this HUGE 'cult of personality' where anything that happens in theoretical physics is because he wants it to. That just goes to show you're lying about your academic status. If you were part of the theoretical physics community on that kind of level you'd know he's not the be all and end all. People at DAMTP don't get down on their knees and bow to him when he goes through there.

If you have to resort to the cover of Scientific American instead of actual published papers, there's something wrong. Also the fact you're top 10 in the world for Riemannian Geometry and you're asking for someone off the internet whose admitted to not even being able to follow my black hole lecture notes (no offence intended ubavontuba, you did admit they were over your head) to help you in your plans for the future? There's at least 50 people a year output by Cambridge who understand that stuff, never mind all the other good unis in the world. Surely you can find someone who understands your area of research to help you? Why resort to someone you just met online? Unless it's because you aren't a member of academia, you lied about your position and you are showboating in an attempt to make your personal dislike of Hawking seem more credible.

I can't help but notice a lack of any concrete material against him other than "Well we just don't know so we shouldn't do it!" They said that about the A bomb, it might ignite the atmosphere.

Unless you can bring some credible work to the discussion, showing the flaw in Hawking's work I'm inclined to follow people who I know have professorships in this area rather than someone who claims to have but doesn't demonstrate any ability.
homo sapiens at risk
ph34r.gif all right, im enjoying this, because is fresh and you do have passion, and now alpha you are less sanguine, i tried first with cern with hawking with the people who should be showing responsiblity with humanity not with the z particle, and they wont do it, they were polite because they respect my work and i do respect them but thats it in the theoretical arena... this is not theory, you cannot isolate yourself from humanity... i come from the 3rd world not from the oxbridge colleges... i love this planet more than the z particle... and i want this conversation to keep alive, at due time i will redirect you to my international conferences on riemannian geometry and quantum time and would appreciate your comments... though it will be probably a little bit over your present level... on the film... A film and i just mailed the editor the first 3 minutes is emotional not mathematical and it will be done and put cern in place... so ubavontuva showed a passion challenging all of you without knowing the maths, that i appreciated and i need an assistant with that passion but in LA as i have to move there for a year to do the film the answer was overwhelming, and very very strongly negative, how they dare, was the first question... go down from your classes, you probably are 1/3rd of my age, how they dare to play the russian roulette with mankind for the zeta particle... for the higgs... i expect that one of us, and were are not more than a dozen today in the world, will find the unification theory within this decade, but not with cern experiments, im close to it, they are close to it... i showed you a hint in the vortex analysis... but you dont understand the basis... now put that vortex analysis in a hillbert space, quantize it and dimensionalize it for each particle and you will find the exact mass, the why not the how that feynmann asks... the power is in the mind and each century we go deeper... the quest for truth is legitimate, but not the way is happening... and at that point... i dont care... the universe is dual... and those 2 forces wont be unified... not at cern... not with the penrose-hawking approach, not even with the triade of quantum gravity masters becuase it wont happen through the analysis of geoemtrical space but of logical time. space is like a slice of present the how, that the logic of time, moves from past to future... and the key is quantum time... and the revolution is near... and it doesnt need the w and z particle... and it wont come from physics but from the marrying of the 3 time concepts available today, evolutionary time, and physical time, keep studying... dont think physicists are bad people, but they have to get real and go down from their theleological concept and love mankind in concrete not abstract numbers, the logic of time is biologic as much as geometric, that is the real unification, morning has broken and it is my first day in LA, strange city, a new road to reality (that is a good book, but how many can understand that, when physicists would figure out that they have to service humanity not their ego) i wonder ph34r.gif
AlphaNumeric
QUOTE (homo sapiens at risk+Nov 4 2006, 03:47 PM)
i tried first with cern with hawking with the people who should be showing responsiblity with humanity not with the z particle, and they wont do it, they were polite because they respect my work and i do respect them but thats it in the theoretical arena...

You think CERN would stop building the LHC because Hawking asked them to? Now I'm convinced you're lying about your status because you obviously have no idea about how things work in the theoretical physics community. Hawking isn't the King that we all get permission to do things from. He doesn't say "Jump!" and we ask "How high?". He's one of many many many researchers. Yes, he's one of the better ones, but even that doesn't make him a leader in the sense that he makes the descisions about things to be done.
QUOTE (homo sapiens at risk+Nov 4 2006, 03:47 PM)
i showed you a hint in the vortex analysis... but you dont understand the basis... now put that vortex analysis in a hillbert space, quantize it and dimensionalize it for each particle and you will find the exact mass,.
Don't just arm wave and throw buzzwords at me, actually do it properly, in the form of a paper and show Hawking wrong. It's easy to get a few technical words from websites and books and give the impression you're onto something.

I'm currently researching the bifrucational instability of coupled nonlinear PDEs on complex manifolds via cohomology groups represented by Lax pairs.

See, it's easy to sound like you're doing something when you're just putting words together. Put your maths where your mouth is. You've had 30+ years to do it to Hawking and you seem not to have managed it!
QUOTE (homo sapiens at risk+Nov 4 2006, 03:47 PM)
this is not theory, you cannot isolate yourself from humanity... i come from the 3rd world not from the oxbridge colleges...
While I admit the 'Cambridge bubble' can be quite a big thing, having experienced it myself, it doesn't mean you are totally detatched if you don't want to be.
QUOTE (homo sapiens at risk+Nov 4 2006, 03:47 PM)
ubavontuva showed a passion challenging all of you without knowing the maths, that i appreciated and i need an assistant with that passion but in LA as i have to move there for a year to do the film
And you can find noone who does know the maths and wants to help you? Surely someone of your stature can find a research assistant? Or are you not of the stature you claim?

Another point against you is that I expect someone whose 60+ and has spent the last 4 decades of his life to be able to construct sentences and paragraphs and not have to break up sentences ..... by using \ldots rather than full stops and capital letters. Yes, it's the internet but I'd expect someone of your experience in writing formal papers and working in universities to have mastered basic grammar and sentence construction to the point where it was second nature.

Just so there's no misunderstanding, I think you're a liar. You show no understanding of science, both on a working level of the physics itself nor on the level of how scientists function in groups. You demonstrate that you have a huge prejudice against Hawking and this bleeds through into a prejudice about theoretical physics because you think he controls it. I've seen you demonstrate no more than 'I've heard of these words' physics knowledge.

You seem to have fallen under a similar misunderstanding to all those people who think E=mc^2 is the centre of all physics because it's the only equation you ever hear about in the media (everything else is too complicated for the average guy on the street). You've read about Hawking and heard the media mention him a lot because he's somewhat of a symbol and taken this to mean he's a leader in the literal sense. He's not and if you were actually in academia you'd know that.
Zephir
I'm afraid, even if we'll confirm some Higgs particle existence using an expensive collider experiments, we will not able to compute the mass of electron ab-initio with higher precision, the Heim was able in its bedroom just using a vacuum constants. You see: no colliders, no experiments, just a power of human imagination is able to replace a thousand of scientists and technicians, all these experiments and coliders. We should less experiment and more think about Universe nature and alternative theories, as it always saves money.

On the other hand, even if confirmed, the Higgs particle will not help us in explanation of origin of mass. It just transfers the explanation of particle mass to the explanation of mass of some Higgs lattice and the character and origin of such lattice will remain unknown. It means, the existence of Higgs mechanism is just of partial importance, if you have no some more deeper & general model. I can believe you, the research in Cern is comfortable for lotta people and its carriers, but here's always question, whether such investments can be done more effectively. It's funny, the proof of Higgs boson by dangerous & expensive LHC experiments doesn't helps us to compute the electron mass more exactly, then Heim's theory enables...

There is a lot of much more important experiments of solely practical significance, we are down of energies, we are destroying the life environment by the fossil fuels burning daily, etc. You will have some hypothetic boson existence confirmed by the less indirect way, maybe - but you'll lose a much of the nonrecoverable life environment treasures in between. And after than - what's irony - we will not able to compute the electron mass without Heim's theory anyway. I suppose, it's pathetic result - we're risking for nothing. I'd prefer to have a better model of vacuum structure at first, then successful, but very last experimental proof of it... wink.gif

For example, the cold fusion was "theoretically impossible" with the many valid figures of precision, too. Now we can see it in the labs during the secondary degree student experiments. We can see each tiny explosion. The phase transition of vacuum is not expected to be a quite "tiny spark".

User posted image user posted image

And at the end, here's the last big problem in ethic: at the present state of knowledge, nobody can confirm, such experiments are completely safe for the rest of human civilization. If some group of scientists wants to create black hole for better publications, it's OK - but why not to create it at the free space at the safe distance? If some problems occurs, just a few mad scientists will die. But these scientists aren't interested about rational understanding of reality so much in fact - there is a lot of personals and political factors in this game, than solely rational.

The main question arises are the human beings sufficiently full-grown & responsible for such kind of experiments?
ubavontuba
QUOTE (AlphaNumeric+Nov 4 2006, 12:05 PM)
You think that Hawking has forced the people who run CERN to build the LHC? That none of them have looked at his work and gone over it? That none of them have built more onto it?

Sorry for intruding in your conversation, but...

Here you are implying that it's a proven theory! How can that be? The truth is that no matter how finely it is examined, it remains an untested hypothesis. No one is certain that it will work. Unfortunately, the recent history of theoretical physics has been full of unpredicted surprises. We might even get something unforeseen, that is inherently more dangerous!

QUOTE
They aren't doing it because Hawking wants a Nobel Prize and has forced them to, they are doing it to further science in the area of the Standard Model and to look for 'New Physics'. Just yesterday I attended a seminar by someone who was outlining how much the LHC would decrease the uncertainty in things like the mass of the W+ boson. It's for MUCH more than Hawking's benefit. Infact, it'll only be for his benefit if they actually do manage to make a black hole, which is very very unlikely.


This is merely a smoke screen put up to calm our fears. The truth is they entirely do expect to make thousands of black holes at a time. It even says so in their own literature. Furthermore, it is thought they may have already started production elsewhere, as seen here.

QUOTE (->
QUOTE
They aren't doing it because Hawking wants a Nobel Prize and has forced them to, they are doing it to further science in the area of the Standard Model and to look for 'New Physics'. Just yesterday I attended a seminar by someone who was outlining how much the LHC would decrease the uncertainty in things like the mass of the W+ boson. It's for MUCH more than Hawking's benefit. Infact, it'll only be for his benefit if they actually do manage to make a black hole, which is very very unlikely.


This is merely a smoke screen put up to calm our fears. The truth is they entirely do expect to make thousands of black holes at a time. It even says so in their own literature. Furthermore, it is thought they may have already started production elsewhere, as seen here.

You seem to think Hawking has this HUGE 'cult of personality' where anything that happens in theoretical physics is because he wants it to. That just goes to show you're lying about your academic status. If you were part of the theoretical physics community on that kind of level you'd know he's not the be all and end all. People at DAMTP don't get down on their knees and bow to him when he goes through there.


But they don't much question him either. Tell me about the relationship between Hawking and Unruh radiation. Tell me how one can exist without the other.

QUOTE
(no offence intended ubavontuba, you did admit they were over your head)


None taken. A man has got to know his limitations. Only then might he know his capabilities.

QUOTE (->
QUOTE
(no offence intended ubavontuba, you did admit they were over your head)


None taken. A man has got to know his limitations. Only then might he know his capabilities.

I can't help but notice a lack of any concrete material against him other than "Well we just don't know so we shouldn't do it!" They said that about the A bomb, it might ignite the atmosphere.


And because it didn't you think it's safe to try this? As a scientist you should know there is no correlation between the two. The A-bomb fear went against the well understood laws of entropy and the conservation of energy. Even I wouldn't have objected to that test!

QUOTE
Unless you can bring some credible work to the discussion, showing the flaw in Hawking's work I'm inclined to follow people who I know have professorships in this area rather than someone who claims to have but doesn't demonstrate any ability.


I'd like to know your opinion of the Unruh radiation article that both I and rpenner cited.
ubavontuba
QUOTE (AlphaNumeric+Nov 4 2006, 03:20 PM)
I'm currently researching the bifrucational instability of coupled nonlinear PDEs on complex manifolds via cohomology groups represented by Lax pairs.

Ha-ha! He does have a sense of humor! tongue.gif

Does this relate in any way to "The Big Bowl o' Spaghetti" TOE hypothesis?
ubavontuba
QUOTE (Zephir+Nov 4 2006, 09:14 PM)
And at the end, here's the last big problem in ethic: at the present state of knowledge, nobody can confirm, such experiments are completely safe for the rest of human civilization. If some group of scientists wants to create black hole for better publications, it's OK - but why not to create it at the free space at the safe distance? If some problems occurs, just a few mad scientists will die.

This is exactly what I have advocated all along. I feel it is important to perform the research, just do it at a safe distance. You wouldn't build a dynamite factory next to a schoolyard, would you?

Besides, if the theoretical physicist's proven abilities to obtain funding were directed toward an international space development effort, one can barely imagine the advances this would bring to humanity!
MrMysteryScience
QUOTE
(Zephir @ Nov 4 2006, 09:14 PM)              And at the end, here's the last big problem in ethic: at the present state of knowledge, nobody can confirm, such experiments are completely safe for the rest of human civilization. If some group of scientists wants to create black hole for better publications, it's OK - but why not to create it at the free space at the safe distance?


" IF" There is a very good question perhaps... If a self propagating black hole were to be created ( Hypothetically, not that it will or won't be at CERN ) But if a black hole were created artificially, how far from a solar system would be safe to have such a gravitationally intense object ?


MYSTERY
cool.gif
ubavontuba
QUOTE (MrMysteryScience+Nov 4 2006, 11:24 PM)

" IF"   There is a very good question perhaps... If a self propagating black hole were to be created ( Hypothetically, not that it will or won't be at CERN ) But if a black hole were created artificially, how far from a solar system would be safe to have such a gravitationally intense object ?


MYSTERY cool.gif

It could actually be quite close, and still be perfectly safe - so long as it's in a stable orbit (preferably away from large masses).

Technically, you could turn the moon into a blackhole without significantly affecting the earth. Tides would still rise and fall. Only the fine view of our lovely companion and the occasional solar eclipse will have disappeared.

I wouldn't recommend a lunar platform though. It's too valuable as a stepping stone and too near (should there be any ejected debris). Perhaps a Jovian moon? That way if anything slipped away from the moon, it'd still likely be captured by Jupiter.

However, none of this is even necessary if they tune the beam energies such that one is significantly weak enough to ensure escape velocity of any collider products created in the most energetic collisions. That alone would satisfy my concerns. Unfortunately, this would diminish the capabilities of the collider. It'd be a hard sell to convince the scientists not to use it to its fullest capacity. I fear the temptation to dial it all the way up might be prove to be irresistible.
MrMysteryScience
After reviewing my question last, I realized I used a word that could be easily misinterpreted. The word I am speaking of was "propagating" as in "a self propagating black hole". I should have perhaps used the phrase "self sustaining"

Also, I realize I didn't mention the size or G rating of such an artificial construct, and that would effect the answer. But I do imagine that humanity's abilities at creating black holes would be limited at the start. And whatever answer I would receive would be hypothetical as the question was such.

But I envision this "small" black hole having an intense orientation to any local G source in space time, perhaps not unlike a compass which orients towards the strongest magnetic attraction available. So would be the hole towards a G source, Sol being number one, and yet like a compass passing near a piece of iron, could be deflected by a closer G attraction, like a planet. I think this might reflect something related to Newton's laws, but am not sure. A black hole may have an odd behavior unknown because of it's intense G attraction, and the fact that we have never had close up long term observations of hole behavior...For instance a gyroscope normally sitting on a table will rotate in place, but under disturbance will begin to move back and forth in odd manners until stability is obtained. A natural example of this behavior would be the odd movements that a tornado exhibits as it moves it's vortex along a drunken path. When I envision a black hole I see a vortex that somehow extends in all directions at the same time; 360 degrees as perceived in normal space time, but perhaps not so stable when influenced by a local G source.

Comments?
ubavontuba
QUOTE (MrMysteryScience+Nov 6 2006, 01:12 AM)
After reviewing my question last, I realized I used a word that could be easily misinterpreted. The word I am speaking of was "propagating" as in "a self propagating black hole". I should have perhaps used the phrase "self sustaining"

    Also, I realize I didn't mention the size or G rating of such an artificial construct, and that would effect the answer. But I do imagine that humanity's abilities at creating black holes would be limited at the start. And whatever answer I would receive would be hypothetical as the question was such.

    But I envision this "small" black hole having an intense orientation to any local G source in space time, perhaps not unlike a compass which orients towards the strongest magnetic attraction available. So would be the hole towards a G source, Sol being number one, and yet like a compass passing near a piece of iron, could be deflected by a closer G attraction, like a planet. I think this might reflect something related to Newton's laws, but am not sure. A black hole may have an odd behavior unknown because of it's intense G attraction, and the fact that we have never had close up long term observations of hole behavior...For instance a gyroscope normally sitting on a table will rotate in place, but under disturbance will begin to move back and forth in odd manners until stability is obtained. A natural example of this behavior would be the odd movements that a tornado exhibits as it moves it's vortex along a drunken path. When I envision a black hole I see a vortex that somehow extends in all directions at the same time; 360 degrees as perceived in normal space time, but perhaps not so stable when influenced by a local G source.

Comments?

Mystery,

A blackhole doesn't have any more gravity than an equivalent mass. It's the relative size of the mass that makes it a blackhole. That is it's density is confined within a space that is smaller than the event horizon (Schwarzschild radius).

Wikipedia has a decent article on it: http://en.wikipedia.org/wiki/Schwarzschild_radius

P.S. It's supposed that most blackholes are actually Kerr-Newman (rotating/ring) blackholes. Essentially, perfect gyroscopes!
Shemi
Perhaps it has already been mentioned on this post (i haven't yet read page 3) but, has it occured to anyone that in order for a BH to be formed at the LHC it would require physics beyond the standard model, most probably string theory.

Furthermore, if the particular version of string theory necessary did turn out to be true the BH would evaporate (BH evaporate in string theory via Hawking radiation).

the probability a BH produced in a particle collision of say 7 TeV (around the max. at LHC) (which would weigh less than 7000 amu or 4.86E-23kg) would be hit by anything in order to increase its mass is very low, similar to the probability of a reaction such as that in LHC (with similar energy) happening inside the earth (since that is where the BH would be falling and densities like that in the collision would be required to make interaction likely)

personally, I don't think any black holes will be produced at the LHC, and even if they were I don't think any current (valid/consistent with known experiments) theory that would apply to them would show that they would pose a threat.

I could be wrong, misunderstand something, or just be being repititious but, this is how I understand the situation (and I doubt I could be wrong enough to need to worry about the LHC).
homo sapiens at risk
ph34r.gif semi as per my last posts the fundamental risk involved in the experiments at cern is the creation of an ice-9 reaction with teh creation of strange matter. The cern gave a probability of 1 in millions for strange matter to happen. This is utterly false after the last discoveries by members of the chinese academy of high particle physics, that it is only needed around 1000 quarks in deconfined state to create a negative lump of strange matter which means the cern will create strangelets with 100% of probability. Now, the lowest number of quarks needed are for negatively charged strange matter that might or might not fluctuate as your nucleons do between u-d configurations changing its charge at will and accreting the Earth in a runaway reaction.
The conventional abstract concept that a particle is static not dynamic (in which case it wont accrete) has been proved wrong once and again as we learn more about particles. We first though protons and neutrons were different aprticles and now we beleive they mutate into each other via pions, we thought neutrinos were 3 different particles andnow we know they mutate into each other when coming from the sun. We thought spirals and bar galaxies were diffeent and now we know they mutate into each other as the central black hole feeds in integalalacti matte. So it is vey likeley that strangelets will change sign and accrete the earth.

This article which prompted me to become an activist against cern has not been contested but ignored purposedly because the cern has no defense against what looks now as a russian roulette game against the survival of the human species. I want you physicists here since i am supossed to be Einstein's barmaid according to alpha to prove this wont ahppen.
The deviation of this argument by alpha with personal insults and his intention to break the internet protocol that allows anyone to keep his anonimity, (as i never ask him his name) are very worrisome, because they prove he has no arguments.
The same as per his attempts to deny the scientific method which is based in the creation of a sound logic hypothesis latter tested by experimental proves, in order to demostnrate the veracity of a theory... both of which elements are lacking in mr. hawking's work. But i will no longer talk of the black hole because the fundamental risk is now again strangelets...
If he cannot defend his case, i suggest him to ask his teachers to come here and defend or explain to 'the hobo' why humanity should not think that a group of people in a concealed environment is plotting to create an event for ideological reasons that can harm millions of human beings, the present legal definition of terrorism. (and it doesnt matter that the ideology is that allah is god, that the god's particle aka higgs will appear and reveal the nature of it all, or that the world is floating over a turtle, ideologies are theories without experimental prove that can come from any discipline)
The one that says that a small ball of strangelets can be negative is: G. X. Peng, X. J. Wen, Y. D. Chen, New solutions for the color-Favor locked strangelets. Phys. Let. B633 (2006) 314-318. It is available at URL http://arxiv.org/abs/hep-ph/0512112. ph34r.gif

AlphaNumeric
QUOTE (ubavontuba+Nov 4 2006, 11:10 PM)
Here you are implying that it's a proven theory!  How can that be?  The truth is that no matter how finely it is examined, it remains an untested hypothesis.  No one is certain that it will work. 

No, I'm not saying it's a proven theory, I'm saying that it's not just Hawking saying "I'm right" and everyone just taking his word for it. Plenty of very clever people (cleverer than you or I or HomoSapiens@Risk) have looked at his work and consider it to be correct and have even built upon his theories.
QUOTE (ubavontuba+Nov 4 2006, 11:10 PM)
Unfortunately, the recent history of theoretical physics has been full of unpredicted surprises. We might even get something unforeseen, that is inherently more dangerous!
Of course we don't know exactly what's going to happen, if we did, then we'd not need to do experiments!

If you take the attitude "It's dangerous, don't do it" we might as well just stop doing any kind of scientific research. Gene therapy on diseases might create an unstopable super virus. Setting off the first atomic bomb might have burnt the atmosphere away. Turning on CERN might (and it's a fantastically small might) create a black hole which might not evaporate and might not have enough momentum to leave the Earth's gravitational well and which might collide with a few atoms as it There is a lot of much more important experiments of solely practical significance, we are down of energies, we are destroying the life environment by the fossil fuels burning daily, etc. You will have some hypothetic boson existence confirmed boscillates about the Earth.

I'm pretty sure the people building CERN don't want to die and if they considered it a significant risk they wouldn't do it.
QUOTE (ubavontuba+Nov 4 2006, 11:10 PM)
his is merely a smoke screen put up to calm our fears. The truth is they entirely do expect to make thousands of black holes at a time. It even says so in their own literature
And they fully expect them all to evaporate.

You're picking and choosing which bits of mainstream physics to follow. You agree with them that they'll make black holes but you dont' agree they'll evaporate.
QUOTE (ubavontuba+Nov 4 2006, 11:10 PM)
And because it didn't you think it's safe to try this?
I think the chances of our understanding of quantum mechanics and thermodynamics being so far wrong like that are very very slim.
QUOTE (ubavontuba+Nov 4 2006, 11:10 PM)
I'd like to know your opinion of the Unruh radiation article that both I and rpenner cited.
I don't know anything about it.
QUOTE (Zephir+Nov 4 2006, 10:14 PM)
You see: no colliders, no experiments, just a power of human imagination is able to replace a thousand of scientists and technicians, all these experiments and coliders. We should less experiment and more think about Universe nature and alternative theories, as it always saves money.
Experiments ALWAYS have to be done. ALWAYS, otherwise you can come up with any old crap and claim it's right. Do you think all the physics which can possibly happen happens at energies less than 1TeV? You'd be very naive if you said yes. Hence, new and more powerful experiments will always be wanted, to check current models and to see if anythings new.

It's a never ending investigation. Or do you think we should never do another experiment using particle colliders again?
QUOTE (Zephir+Nov 4 2006, 10:14 PM)
doesn't helps us to compute the electron mass more exactly, then Heim's theory enables...
It should be noted that Heim's theory doesn't explain interactions and predicts two particles which are known to not exist unless Heim got their masses wrong by several orders of magnitude (which then calls into question his mass calculating abilitiles) along with a non-existent neutral electron. Heim theory also has trouble with particles known to exist like the W and Z bosons and gluons. Masses predicted as often for composite particles, not the fundamental particles which make them up (the composite nature of protons and neutrons wasn't really understood then).

While Heim theory is close in many cases, it's predictions often still fall out of experimental ranges for particle masses or other quantities directly dependent on those masses. It is obviously not the be all and end all you seem to often imply. Should a supersymmetric particle be found it'll be completely falsified too.
QUOTE (Zephir+Nov 4 2006, 10:14 PM)
There is a lot of much more important experiments of solely practical significance, we are down of energies, we are destroying the life environment by the fossil fuels burning daily, etc. You will have some hypothetic boson existence confirmed by the less indirect way, maybe - but you'll lose a much of the nonrecoverable life environment treasures in between.
I don't think it's the relatively small community of theoretical physicists which are soley to blame for the desctruction of the environment. I think you'll find it's also the fault of most of human civilisation. There ARE cleaner technologies out there or in the pipe line, but while people want everything as cheap as possible, it's more economically viable to pump oil out the ground and burn it than to invest in fusion power and get a clean source of electricity to create hydrogen fuel cells.

Don't blame theoretical physicists for the problems of a wasteful society. The US has spent over $400 billion on Iraq and Afganistan. Think of all the good that could have done for the ENTIRE world if they'd spent it on getting fusion sorted in the next 20 years? No more reliance on fossil fuels. But instead it's quicker and easier to invade the countries with oil and use that in our preexisting infrastructure.
QUOTE (Zephir+Nov 4 2006, 10:14 PM)
For example, the cold fusion was "theoretically impossible" with the many valid figures of precision, too. Now we can see it in the labs during the secondary degree student experiments. We can see each tiny explosion. The phase transition of vacuum is not expected to be a quite "tiny spark".
The people who get cold fusion to work repeatably will win a Nobel Prize. There's no grand conspiracy in the scientific community. We don't all get indoctrinated into it the moment we start PhDs. The fact is noone has done it and managed to repeat it, if done it at all.

It's like 'scientific proof of creationism'. Plenty of people claim it's about but never seem to actually produce the goods.
QUOTE (homo sapiens at risk+Nov 6 2006, 03:35 PM)
The deviation of this argument by alpha with personal insults and his intention to break the internet protocol that allows anyone to keep his anonimity, (as i never ask him his name) are very worrisome, because they prove he has no arguments.
I normally don't care what people's names are, it generally makes no difference at all to what they say. However, you claimed to be in the top 10 of the WORLD for this kind of stuff so I asked for you to prove it since that's one hell of a claim. Either prove it by giving your name and papers you've published in this area along with some proof you're that person, or type up anonymously some physics which demonstrates Hawking is wrong (since you consider him very wrong) in order to demonstrate your ability.

You didn't do that. Hell, your last post which.... had a lot of ..... gaps instead of using..... full stops to construct normal sentences. I'd expect more from someone of such a high calibre of physics ability.

If you really are in the top 10, then I'll tell you now you do yourself absolutely zero favours in the way you come across online. You display little to no understanding of how the physics community works, nor do you display much understanding of physics itself. You must spend a hell of a lot of time typing up your papers if you manage to get them published!
QUOTE (homo sapiens at risk+Nov 6 2006, 03:35 PM)
But i will no longer talk of the black hole because the fundamental risk is now again strangelets...
So now that you can't produce any concrete evidence about the problem with black holes, despite having had 30 years and being an expert, you're going to change the subject. Again, it isn't doing much for your image of being in the top 10 of the world.
QUOTE (homo sapiens at risk+Nov 6 2006, 03:35 PM)
The one that says that a small ball of strangelets can be negative is: G. X. Peng, X. J. Wen, Y. D. Chen, New solutions for the color-Favor locked strangelets. Phys. Let. B633 (2006) 314-318. It is available at URL http://arxiv.org/abs/hep-ph/0512112.
I suggested reading the second half of the right hand column of page 4. I'll quote it for you :
QUOTE
However, they are unable to transform our planet into a strange star for the following two reasons.
MrMysteryScience
This is good, Uba, I had feared that the subject matter had fallen into a log jam as it were. As to the black hole consideration, which I had left as hypothetical to get real consideration of the basics involved. I am left wondering how dangerous that situation would be? In fact I had a fleeting hope that perhaps a tiny enough black hole might someday be able to run my wristwatch as I do detest the cheap new watch batteries that seem to run out of juice every 2 months. My point actually being; what is the real fearful part that you see coming from a black hole?
I have my own concerns, and will lightly touch upon a bit before this post concludes.

Shemi, hello, your comments mirror some parts of my own. I am not a terrific fan of String, but as is obvious, will discuss theories I am unsure of as tho they are correct as from the sheer number of competing theories, the majority of theories must be incorrect, and hence the majority of people in physics must have incorrect views as there are non compatible parts in each.( So logically the odds against me being correct in my own beliefs is against me, so I should listen to other's concepts and give their ideas some weight) There is the rub as another recently pointed out, a project that accepts certain concepts and designs for projected results that may have a factor of danger, and yet proceeds does not seem logical and perhaps dangerous.

HSAR, I am afraid I only have a passing knowledge of strangelets, certainly have never done an in depth study on them, as I vaguely recall they seemed fairly stable though. Could you go into more depth as to the potential danger here? At a layman's level if that is possible. I note that you mention that millions might die, and did not say Billions, is that an indication that the danger would be somehow limited, and not an earth crushing blow? ( Although Millions is a horror that would certainly be unacceptable )
In some ways - Geometrically - I consider black holes as multidimensional Vortices's, and do have a fear that this is cause for alarm. I had noticed in another discussion your speaking of Vortex. It seems a powerful enough vortex in space-time might be a danger as well, although it seemed as though you treated it rather lightly, I'd be interested in that from a spacial geometrical perspective if you would be willing to share again just as a hypothetical, and no need to go into how such a thing might be created...

Thank You all,

Mystery cool.gif
rpenner
Quite a while ago, I replied to a thread where ubavontuba put forward a link where someone was speculating about a 20TeV (about 20,000 amu) black hole. I tried to quell fears with actual math, but I don't know what ubavontuba (and hs @ risk) actually fear. Perhaps they would counter with their calculations.

QUOTE (rpenner+Jul 15 2006, 10:28 PM)
[According to a non-GR theory of quantum gravity ...]the hypothesized stable 10^-4 fermi black hole will be formed stationary in the laboratory frame and will fall, frictionless through the laboratory at 9.81 m/s^2, capture two electrons, and chew a cylinder 10^-4 fermi ^2 by the earth diameter, only to reverse course and do the same again for all time. Given that it's gravity is vanishing, please calculate at what rate the black hole will consume Earth's mass. I work it out at 3.14 * 10^-38 * 1.28 x 10^7 = 4 x 10^-31 m^3 per semi-orbit -- assuming a density of 8000 kg/m^3, that's about 2 amu per semi-orbit, or a growth in mass by 0.01%. After 10,000 passes, the hypothetical world-killer would have doubled in mass -- about 9 months would have passed, but I put it to you that the black hole would not have grown proportionally in size, since the theory of gravity being used is not GR, but some high-dimensional theory. For example, in GR, a 1 kg black hole has a radius of 1.48x10^-12 fermi. So it would take this quantum dohickey 1.5x10^30 years of linear growth to grow to the size of a GR black hole with a radius of 10^-4 fermis (4x10^34 amu). That's 1500 billion billion billion years. Assuming CERN can and does make them at a rate of 1 per second and continues to do so for 45000 years, AND the 10-D theory is right and Hawking is completely wrong and these black holes coallese and Earth-bound humanity manages to survive global warming, the oil crisis, and the Asian flu pandemic, and the Sun leaving the main sequence, then in a mere billion billion years, we might begin to have a problem.


Cern Courier: The case for mini black holes
QUOTE
It should be stated, in conclusion, that these black holes are not dangerous and do not threaten to swallow up our already much-abused planet. The theoretical arguments and the obvious harmlessness of any black holes that, according to these models, would have to be formed from the interaction of cosmic rays with celestial bodies, mean that we can regard them with perfect equanimity.


Meaning, we have good evidence that 300EeV collisions happen all the time in the local neighborhood and nothing bad has ever been observed. The longevity and stability of pulsars (with their neutron-star densities) seems to show that catastrophic, world-ending particle collisions don't occur at scales below 300EeV (300 million TeV).
ubavontuba
QUOTE (Shemi+Nov 6 2006, 05:51 AM)
Perhaps it has already been mentioned on this post (i haven't yet read page 3) but, has it occured to anyone that in order for a BH to be formed at the LHC it would require physics beyond the standard model, most probably string theory.


You need to read more then. It's thought that they've already accomplished it!

QUOTE
Furthermore, if the particular version of string theory necessary did turn out to be true the BH would evaporate (BH evaporate in string theory via Hawking radiation).


Supposedly, but it assumes a quantisized field radiation. Did you read the paper I cited that questions the existence of Unruh radiation (it's based on the same principles as Hawking radiation)?

QUOTE (->
QUOTE
Furthermore, if the particular version of string theory necessary did turn out to be true the BH would evaporate (BH evaporate in string theory via Hawking radiation).


Supposedly, but it assumes a quantisized field radiation. Did you read the paper I cited that questions the existence of Unruh radiation (it's based on the same principles as Hawking radiation)?

the probability a BH produced in a particle collision of say 7 TeV (around the max. at LHC) (which would weigh less than 7000 amu or 4.86E-23kg) would be hit by anything in order to increase its mass is very low, similar to the probability of a reaction such as that in LHC (with similar energy) happening inside the earth (since that is where the BH would be falling and densities like that in the collision would be required to make interaction likely)


Fragment. Please clarify.

QUOTE
personally, I don't think any black holes will be produced at the LHC, and even if they were I don't think any current (valid/consistent with known experiments) theory that would apply to them would show that they would pose a threat.

I could be wrong, misunderstand something, or just be being repititious but, this is how I understand the situation (and I doubt I could be wrong enough to need to worry about the LHC).


Personally, I think you're probably right. However the stakes are so high that safety needs to be ensured, not assumed.
ubavontuba
QUOTE (homo sapiens at risk+Nov 6 2006, 02:35 PM)
ph34r.gif ...the fundamental risk involved in the experiments at cern is the creation of an ice-9 reaction with teh creation of strange matter. The cern gave a probability of 1 in millions for strange matter to happen. This is utterly false after the last discoveries by members of the chinese academy of high particle physics, that it is only needed around 1000 quarks in deconfined state to create a negative lump of strange matter which means the cern will create strangelets with 100% of probability... ph34r.gif

Right. Strange matter is a whole 'nuther concern!
ubavontuba
QUOTE (AlphaNumeric+Nov 6 2006, 03:24 PM)
No, I'm not saying it's a proven theory, I'm saying that it's not just Hawking saying "I'm right" and everyone just taking his word for it. Plenty of very clever people (cleverer than you or I or HomoSapiens@Risk) have looked at his work and consider it to be correct and have even built upon his theories.

Right. And these same clever people have completely missed the conservation of momentum law in their argument that it's safe because it happens all the time naturally. Like I'm just supposed to trust these "very clever people". Sorry, it's my world too. They have no moral right to risk us all for this useless (to society) experiment.

QUOTE
Of course we don't know exactly what's going to happen, if we did, then we'd not need to do experiments!


I agree. This is why we should both play it safe with these experiments, and continue them (preferably far away).

QUOTE (->
QUOTE
Of course we don't know exactly what's going to happen, if we did, then we'd not need to do experiments!


I agree. This is why we should both play it safe with these experiments, and continue them (preferably far away).

If you take the attitude "It's dangerous, don't do it" we might as well just stop doing any kind of scientific research.


Don't be stupid. Most research is harmless and beneficial to society. This one isn't likely to be beneficial and it may not be harmless.

QUOTE
Gene therapy on diseases might create an unstopable super virus.


The weaponization of gene research certainly could pose such a threat.

QUOTE (->
QUOTE
Gene therapy on diseases might create an unstopable super virus.


The weaponization of gene research certainly could pose such a threat.

Setting off the first atomic bomb might have burnt the atmosphere away.


As I stated earlier, this goes against the laws of entropy and the conservation of energy. The combustion temperature of the atmosphere is around 2500 degrees Fahrenheit. It requires more energy to ignite the atmosphere than it returns from combustion. There's no way the flame front could be self-supporting.

QUOTE
Turning on CERN might (and it's a fantastically small might) create a black hole which might not evaporate and might not have enough momentum to leave the Earth's gravitational well and which might collide with a few atoms as it


Or, it might precipitate a cascade or chain-reaction event that'd destroy the earth. You keep forgetting about the gravity and internal pressure of the earth itself, just looking for a way out. Small leaks, become large leaks, become a torrent.

QUOTE (->
QUOTE
Turning on CERN might (and it's a fantastically small might) create a black hole which might not evaporate and might not have enough momentum to leave the Earth's gravitational well and which might collide with a few atoms as it


Or, it might precipitate a cascade or chain-reaction event that'd destroy the earth. You keep forgetting about the gravity and internal pressure of the earth itself, just looking for a way out. Small leaks, become large leaks, become a torrent.

There is a lot of much more important experiments of solely practical significance, we are down of energies, we are destroying the life environment by the fossil fuels burning daily, etc. You will have some hypothetic boson existence confirmed boscillates about the Earth.


So why are we wasting so many resources on this experiment?

QUOTE
I'm pretty sure the people building CERN don't want to die and if they considered it a significant risk they wouldn't do it.


But they are blinded by their own ambitions. NASA is sometimes lax on safety in favor of the science adventure. People die as a result. What makes you think these cowboys are any different?

QUOTE (->
QUOTE
I'm pretty sure the people building CERN don't want to die and if they considered it a significant risk they wouldn't do it.


But they are blinded by their own ambitions. NASA is sometimes lax on safety in favor of the science adventure. People die as a result. What makes you think these cowboys are any different?

And they fully expect them all to evaporate.


And I fully expect to find a pot o' gold at the end of a rainbow. Life teaches us that our expectations often lead to disappointment. There's an old saying: When man plans, God laughs.

QUOTE
You're picking and choosing which bits of mainstream physics to follow. You agree with them that they'll make black holes but you dont' agree they'll evaporate.


No, I agree that it may be possible to create blackholes and I feel they may not evaporate. The physics aren't known. They are merely surmised. Why assume the best case, when the worst case is what needs to be examined with the highest scrutiny?

QUOTE (->
QUOTE
You're picking and choosing which bits of mainstream physics to follow. You agree with them that they'll make black holes but you dont' agree they'll evaporate.


No, I agree that it may be possible to create blackholes and I feel they may not evaporate. The physics aren't known. They are merely surmised. Why assume the best case, when the worst case is what needs to be examined with the highest scrutiny?

I think the chances of our understanding of quantum mechanics and thermodynamics being so far wrong like that are very very slim.


Are you saying then that the Standard Model hasn't needed frequent adjustment?

QUOTE
I don't know anything about it.


You should. Here it is again: http://www.phys.lsu.edu/faculty/oconnell/P...20Radiation.pdf

QUOTE (->
QUOTE
I don't know anything about it.


You should. Here it is again: http://www.phys.lsu.edu/faculty/oconnell/P...20Radiation.pdf

Experiments ALWAYS have to be done. ALWAYS, otherwise you can come up with any old crap and claim it's right. Do you think all the physics which can possibly happen happens at energies less than 1TeV? You'd be very naive if you said yes. Hence, new and more powerful experiments will always be wanted, to check current models and to see if anythings new.


Fine, just do it in regards to the safety and desires of everyone else. It's not all about you.

QUOTE
It's a never ending investigation. Or do you think we should never do another experiment using particle colliders again?


At lower energy levels they've been proven to be quite safe. However now it's a whole new ballgame. Blackholes aren't your typical particle accelerator product. The experiments should be performed, but in a way that doesn't risk the earth (however small that risk is).
ubavontuba
QUOTE (MrMysteryScience+Nov 6 2006, 04:21 PM)
This is good, Uba, I had feared that the subject matter had fallen into a log jam as it were. As to the black hole consideration, which I had left as hypothetical to get real consideration of the basics involved.  I am left wondering how dangerous that situation would be? In fact I had a fleeting hope that perhaps a tiny enough black hole might someday be able to run my wristwatch as I do detest the cheap new watch batteries that seem to run out of juice every 2 months.

Blackholes can't run anything. Gravity is a conserved force. If they actually radiate energy (as per Hawking), the output is thermal, not electric. Containing them is likely to be impossible.

QUOTE
My point actually being; what is the real fearful part that you see coming from a black hole?
I have my own concerns, and will lightly touch upon a bit before this post concludes.


I don't see a real fearful part. I only see a small potential for unrealized catastrophe. However small it is, it shouldn't be ignored nor hand-waved away.
ubavontuba
QUOTE (rpenner+Nov 6 2006, 07:50 PM)
Quite a while ago, I replied to a thread where ubavontuba put forward a link where someone was speculating about a 20TeV (about 20,000 amu) black hole. I tried to quell fears with actual math, but I don't know what ubavontuba (and hs @ risk) actually fear. Perhaps they would counter with their calculations.

And I pointed out that these calculations are linear, when the growth of a static blackhole would be exponential. They also don't account for Earth's own gravity and pressure which would force-feed the blackhole.

QUOTE
Cern Courier: The case for mini black holes

QUOTE (->
QUOTE
Cern Courier: The case for mini black holes

It should be stated, in conclusion, that these black holes are not dangerous and do not threaten to swallow up our already much-abused planet. The theoretical arguments and the obvious harmlessness of any black holes that, according to these models, would have to be formed from the interaction of cosmic rays with celestial bodies, mean that we can regard them with perfect equanimity.

Meaning, we have good evidence that 300EeV collisions happen all the time in the local neighborhood and nothing bad has ever been observed. The longevity and stability of pulsars (with their neutron-star densities) seems to show that catastrophic, world-ending particle collisions don't occur at scales below 300EeV (300 million TeV).


And I have clearly argued (many times) that this argument is irrelevant due to the conservation of momentum law. If nano-blackholes occur as a result of these collisions, by the conservation of momentum law they'd pass cleanly through the earth in less than a second - with well more than escape velocity. The CERN blackholes would not have such a high relative momentum.
MrMysteryScience
Uba, I do think you know that watch battery was a bit of fun, perhaps my leg is pulled slightly as well, and not by the gravity of the discussion, for surely I was aware from the start that the black hole in my watch would surely perturb the pendula within my watch thereby distorting time itself, Ha.To be expected since I don't trust quartz. lol. Ok, I will try to be more serious, thermal energy is convertible to electric though...But the energy bill for such a huge collider to run a watch, absurd.

I said I'd be serious and this surely is a serious subject. Ok , Number 1. MONEY, I have been all over the net looking for exact amounts of money being poured into this thing and it seems that everybody and their sister's uncle Samuel has poured all kinds of Cash,Pound, Franc, Euros, Dollars as it were and totals are further apart than the Swiss banking system is famous for. I don't think anyone will ever know how much this "Thing" has cost . I am astounded at the number of scientists, technical advisers, consultants, people that push big heavy things around, you name it. More absurd than the watch.How many physics theoreticians does it take to spoil a collider?

Read scientific report after report and at the end of it all, they are almost sure, but...well no one can say for positive what to expect. At least they have the best minds working on it. Great. I said earlier in the prior post that I had a concern, and while a dangerous growing black hole would be of great concern, that is not my real first concern, and I'm afraid I wouldn't want to give anyone any really dangerous ideas so I will refrain from mentioning what I actually fear happening by accident in and around such great energies. If it can't be predicted with certainty what will happen by design, then forget understanding the possibility of happenstance. Chernobyl was not designed to do what it did in 86.

My tendencies for humor cause some to wisely distance themselves, but my points do tend to prick when made. I wish this would be abandoned. It won't be. So we will have to live or die with the results.Humanity has it's faults. In one hundred years given technological advances without the collider now, we would be able to create a ten thousand mile linear "shotgun" in the deep vacuum of space that would put this pea shooter to shame. Details are obvious, call it double barreled because they'd be pointed at each other, and no compensations needed for distortions due to curvature. Are we silly talking monkeys? Maybe AI's should take over...

The money would have been so much more wisely spent. I hope that all this is a failure or even better a success, a waste is acceptable, but if we all die then all of the libraries of the entire History of Humanity were vanity, nothing more.

(We are-I am) so stupid, think!

Mystery sad.gif
AlphaNumeric
QUOTE (ubavontuba+Nov 7 2006, 09:30 AM)
Right.  And these same clever people have completely missed the conservation of momentum law in their argument that it's safe because it happens all the time naturally.  Like I'm just supposed to trust these "very clever people".  Sorry, it's my world too.

You trust those people enough to fly in planes or to build nuclear reactors. Besides, if reactions of such power happen a lot in the upper atmosphere, then some reactions will produce black holes of neglibable momentum because they will collide with several particles within the Earth's atmosphere and ground, removing enough of their momentum to make them gravitationally bound to the Earth. Yes, the probability of such collisions is low, as people how demonstrated when calculating how much material a long lasting proton sized black hole would capture, but it's still likely to have happened by now if black holes are produced in the atmosphere with any kind of regularity and they don't evaporate.

Hence the "It happens all the time naturally" argument does actually have validity. Not in single particle collisions but when you consider multiple ones, then it is relevent.
QUOTE (ubavontuba+Nov 7 2006, 09:30 AM)
As I stated earlier, this goes against the laws of entropy and the conservation of energy. The combustion temperature of the atmosphere is around 2500 degrees Fahrenheit. It requires more energy to ignite the atmosphere than it returns from combustion. There's no way the flame front could be self-supporting.
If the initial amount of energy released was enough, then it would have burnt off a sizable amount of atmosphere. Yes, it wouldn't be self sustaining, but the output from the nuclear reaction would have supplied enough energy to be very dangerous for the immediate area, beyond just the heat shockwave.
QUOTE (ubavontuba+Nov 7 2006, 09:30 AM)
Or, it might precipitate a cascade or chain-reaction event that'd destroy the earth. You keep forgetting about the gravity and internal pressure of the earth itself, just looking for a way out. Small leaks, become large leaks, become a torrent.
No, I'm not forgetting gravity, I know it would be pulled into the Earth.
QUOTE (ubavontuba+Nov 7 2006, 09:30 AM)
Are you saying then that the Standard Model hasn't needed frequent adjustment?
This isn't about the finer points of the SM, it's about the general concept of things like the Uncertainty Principle.
QUOTE (ubavontuba+Nov 7 2006, 09:30 AM)
You should. Here it is again: http://www.phys.lsu.edu/faculty/oconnell/P...20Radiation.pdf
I'm sorry, why exactly 'should' I? It's not my job to know everything in physics. I should know some things, things I'm expected to know for exams and for some research but that doesn't mean I should know everything.
QUOTE (ubavontuba+Nov 7 2006, 09:30 AM)
And I pointed out that these calculations are linear, when the growth of a static blackhole would be exponential. They also don't account for Earth's own gravity and pressure which would force-feed the blackhole.
Prove they are exponential. Just because the growth rate is a function of the mass doesn't mean it's exponential. For instance, in Hawking radiation the rate of shrinking is related to thge size of the black hole but the evaporation time is proportional to the cube of the mass and M(t) = \sqrt{M^3 - ct} (as seen in that pdf I posted) which is not exponential!

Even if it is exponential, that doesn't mean the consumption time for the Earth is a 'short time', it can still be exponential and take trillions of years.
rpenner
QUOTE (ubavontuba+Nov 7 2006, 08:59 AM)
And I pointed out that these calculations are linear, when the growth of a static blackhole would be exponential.  They also don't account for Earth's own gravity and pressure which would force-feed the blackhole.

I have justified my use of a linear growth rate for this non-GR black hole of R=10^-4 fermis with an argument quoted above. "but I put it to you that the black hole would not have grown proportionally in size, since the theory of gravity being used is not GR, but some high-dimensional theory." Let me point out, as should be obvious, that any non-GR theory of gravity needs to eventually meet the predictions of GR as the black hole becomes more massive, and in ignorance of the exact relationship between mass and radius, I assumed radius was constant until the mass was sufficient for a GR-black hole to have a radius of 10^-4 fermis, which is both consistent with the principles of high-D theories as I understand them and the most parsimonious prediction given that you have no other sources to back up this model. Thus, from 20TeV to 4x10^25 EeV I predict R=10^-4.

The pressure at the earth's core is negligible at the scale of 10^-4 fermis, as is the Earth's gravity everywhere. The use of the average density of the Earth is completely justified, as I have assumed the worst trajectory and the exact calculation of "sampled" average density cannot differ from mine by more than a factor of 2 and my scenario is many orders of magnitude from being a disaster.

If you are less ignorant, I have invited you to respond with your calculations. "Perhaps they would counter with their calculations."

QUOTE (ubavontuba+Nov 7 2006, 08:59 AM)
QUOTE (rpenner+Nov 6 2006, 07:50 PM)
Meaning, we have good evidence that 300EeV collisions happen all the time in the local neighborhood and nothing bad has ever been observed. The longevity and stability of pulsars (with their neutron-star densities) seems to show that catastrophic, world-ending particle collisions don't occur at scales below 300EeV (300 million TeV).


And I have clearly argued (many times) that this argument is irrelevant due to the conservation of momentum law. If nano-blackholes occur as a result of these collisions, by the conservation of momentum law they'd pass cleanly through the earth in less than a second - with well more than escape velocity. The CERN blackholes would not have such a high relative momentum.
  1. You have no evidence that the possibility exists that any CERN black holes will be produced with less than escape velocity. 10^-4 fermis is a very small sample of each proton and even if every one of your assumptions above is correct, you can't get around the evidence that protons are not point particles but have a rich structure, dominated by nearly free (at these scales) quarks moving near the speed of light.
  2. I clearly was talking about the proven longevity of much denser neutron stars, where a 10^-4 fermi radius tunnel would mass more. 3.14 * 10^-28 cc * 10^14 g/cc = 3.14 * 10^-14 g = 20 billion amu = 20 million TeV = 1 million times the mass of the hypothesized hole. That's a lot of stopping power and to be consistent your comments on pressure and gravity (where valid) surely apply more to the neutron star. (likewise white dwarf, etc)
  3. Moreever, as these are eternal, then the post-neutron star black holes must persist even if not slowed down to below escape velocity, and should form part of the background radiation.
  4. According to your assumptions, all these cosmic origin mini black holes from 20TeV through 300EeV are eternal, but high energy particles are detected by the results of their highly luminous (in the particle physics sense) collisions and decay products thereof. Nothing "collides" with these non-GR black holes, but they are simply captured. Thus evidence of a 300EeV particle is evidence for the collision of a 300EeV particle, and thus evidence against the Earth being so fragile.
MrMysteryScience
Such heated debate at this point, may be moot, because it is well beyond the point of no return. If someone came forward with absolute formula showing disaster, the momentum of the project would carry CERN forward well beyond the review of the facts. ohmy.gif Only an event of extraordinary proportions could stop this research from continuing at this point. A meteor or nuclear war could possibly stop it, but logic is beyond consideration as a real "consideration", such is the nature of our species and societies. Sociology would be perhaps the last thing that a physics forum would wish to relegate the decision of theoretical research to, but thats where it has gone. It has virtually gone beyond the control of the scientists that are supposedly running the operation.

If Stephen Hawking himself were to step forward and say; " OK everyone, this was my little joke on science, got ya." I think there is so much invested that the powers that be would merely say; "Poor guy, the pressure got to him." And the project would proceed. The facts do not matter. wink.gif

Not that this thread is meaningless, it , at the very minimum shows a concern for accuracy and proper procedure, and review, and may help cause more review of said processes into the future if we have one. Ubavontuba has steadfastly maintained a position of needed review of the subject. Review has in many ways become a rubber stamp that says, "if we don't , someone will" We need to be very careful with that attitude, eventually it may spell our end.
rpenner
QUOTE (MrMysteryScience+Nov 8 2006, 01:17 AM)
Such heated debate at this point, may be moot, because it is well beyond the point of no return. If someone came forward with absolute formula showing disaster, the momentum of the project would carry CERN forward well beyond the review of the facts.
Statement of opinion without reference or domain area knowledge.
QUOTE (MrMysteryScience+Nov 8 2006, 01:17 AM)
Only an event of extraordinary proportions could stop this research from continuing at this point. A meteor or nuclear war could possibly stop it, but logic is beyond consideration as a real "consideration", such is the nature of our species and societies.
This seems like pontification. You sound like you would embrace nuclear war over international cooperation on studying the universe.
QUOTE (MrMysteryScience+Nov 8 2006, 01:17 AM)
Sociology would be perhaps the last thing that a physics forum would wish to relegate the decision of theoretical research to, but thats where it has gone. It has virtually gone beyond the control of the scientists that are supposedly running the operation.
    If Stephen Hawking himself were to step forward and say; " OK everyone, this was my little joke on science, got ya." I think there is so much invested that the powers that be would merely say; "Poor guy, the pressure got to him." And the project would proceed.
As has been pointing out, Prof. Hawking has nothing to do with any CERN work at all, so hardly can be considered to be "running the operation." "This was my little joke" is an example of unclear antecedent, which is seen a lot in sloppy writing and sloppy thinking. Also, to the best of everyone's knowledge, this physics forum is physically located in England and has no visitors from CERN. Sociology is the study of human populations, and is almost certainly not the word you mean to use.
QUOTE (MrMysteryScience+Nov 8 2006, 01:17 AM)
The facts do not matter.  wink.gif
Still waiting for fact number one.
QUOTE (MrMysteryScience+Nov 8 2006, 01:17 AM)
Not that this thread is meaningless, it , at the very minimum shows a concern for accuracy and proper procedure, and review, and may help cause more review of said processes into the future if we have one. Ubavontuba has steadfastly maintained a position of needed review of the subject. Review has in many ways become a rubber stamp that says, "if we don't , someone will" We need to be very careful with that attitude, eventually it may spell our end.
As a participant in this thread, it is meaningless. The only possible (mutually incompatible) meanings to come from this thread is for ubavontuba to make his case strong enough to convince even one particle physicist, and ideally a large number of them or for ubavontuba to follow an offered line of reasoning and come to the conclusion that there is plenty of evidence that the experiment is safe.

In fact, ubavontuba is not the first to raise these fears, but has not offered any persuasive demonstration
  • that it is possible to create a 20 TeV/c^2 black hole,
  • that a black hole of mass 20 TeV/c^2 has a lifetime in excess of 100 years,
  • that a 20 TeV/c^2 hole has a capture cross section larger than 10^-4 fermi (or even larger than 10^-35 meters (10^-20 fermi)),
  • that the pressure of the earth's core will have more than an order of magnitude effect on intake rate for such a small hole,
  • that a significant portion of inelastic proton-proton collision products exist at less than Earth escape velocity,
  • that if 20 TeV holes were easy to form in the lab, stars (of all types) could somehow have a lifetime in excess of 10 billion years despite the fact that they have much greater escape velocity and areal density than the Earth
  • that collision of 20 TeV-300EeV cosmic rays with stars over cosmological time would not produce a background of nano-holes of all velocities and therefore dooming the Earth regardless of CERN.
Since everything we know about black holes comes physics calculations, it is curious that ubavontuba's fears do not rest on even one of the listed demonstrations.
MrMysteryScience
rpenner,

Perhaps you did not understand my writ, perfectly understandable. But you did certainly get the context wrong, and even the general points, and did misunderstand considerable associations. For further understanding of Sociology see Sociology , to better grasp the depths of it's purview.

As to your repeating of the same data again , well it's repetitive , do you expect more than the last time? I've seen CERN's report on how safe they have decided it all is, and opposing sides of the fence as well. I still say even if something (factual) exactly stating what you ask were produced (and more) it would not alter the behavior of the human element...The decision has been made to go ahead, and I'm not saying that it is up to this forum to resolve the issue as though this forum (or Stephen Hawking) is somehow in control of CERN. Explaining further what I meant seems redundant. But I will relate some side bars, that might further enlighten some of my unfamiliar terminology.

I have a friend that studies Sociology, and actually some of his discussions drive me up the wall, including his own points systems for scoring points in forums and debates and even everyday human activities. Total reality show fanatic; lol, but some can't but help to rub off. But I have repeatedly told him that social oneupmanship does not alter reality or the facts. (Truth is.) But he does respond that the facts don't mean anything if the human factor goes along and does something that does not adhere to a truth. A politician does not need to be right, or even mean what he says, but he needs to get votes. There is a logic therefore , but not like what most hard scientists seek.

Do want you to know, I do not favor nuclear war , just so you understand that for certain about me.That reference to a meteor or nuclear war was simply logic taken to the absurd level. Perhaps my meanings will be better understood now. Maybe?

cool.gif


homo sapiens at risk
ph34r.gif Got a letter from a leading particle researcher (since im a leading quantum time theorist, a different field, I asked a specialist) to comment on the chinese article on strangelets.
http://arxiv.org/abs/hep-ph/0512112
This is his answer

Dear (my name):

I read the referenced article by Drs. Peng, Wen and Chen of the China
Center of Advanced Science and Techology (World Lab) in Beijing, the
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing,
and the Center for Theoretical Physics at the Massachusets Institute of
Techology (MIT), respectively.

Essentially, their paper is the nail in the coffin for the argument that
only positively charged strangelets can be formed, and hence the
theoretical predicition that there would be no potential for runaway
fusion.

Their paper strongly suggests that strangelets would initially
be slightly negative, but tending toward neutrality as they grew larger
and larger; hence there would never be a Coulomb barrier to prevent any
form of runaway fusion.

The fact that their new solutions to SQM production predict strangelets
to have greater stability than Iron (Z=26), which is the most stable
form of normal nuclear matter, clearly proves that normal matter contact
with strangelets would result in a rearrangement of quarks, leading to a
more stable nuclear form, i.e. an even larger strangelet, with expulsion
of the excess positive electric charge likely by positron emission
(similar to the F-18, Cu-64, C-11, O-15, etc. positron emitting
radioisotopes that I am currently working with in nuclear medicine via
our PET/CT scanners). The previous solutions to SQM
production, beginning with Jaffe's original 1984 suggestion for the
production of strangelets, only showed SQM to be more stable than normal
nuclear matter, for the reasons originally cited by Jaffe.

Their paper is well written, funded by recognized sources (US Department
of Energy, National Science Foundation, and others [FONDECYT, CAS, SEM]), has good citations to
recognized publications, and is well supported by mathematical equations
and argument, as well as intelligible graphs. I find nothing
generically wrong with it, even though I know it as an approximation of
reality. Specifically, we know that SQM is 'quantized' as is normal QM,
and the low A values of their curves should actually be 'jumps' rather
than a smooth continous curve.
That is, however, a very minor criticism that would not normally be
addressed in a paper such as that.

Their paper strongly indicates that creation of any strangelet would create
an immediate problem.

I suggest we bring this paper to the attention of as many nuclear
physicists as possible.

Regards,


(His Name)

So alpha, stop oppossing us and pass it to your students and professors at cambridge, you are in the center of 'physicists authority' (im not, im on the fringes of accepted theory)... Come on lets move, life is too sweet to degenerate it into an ice-9 cube. I disagree with some of you, this can be stopped if enough prestigious physicists write a letter to the authorities in brussels and france that have authority to do stop it... Unlike other things, we scientists did wrong in the past, there is not a mega industrial complex behind, no military secret, no nothing except the fact that we didnt know the risks involved when we started to build the 'thing'. So i believe it can be stopped in a rational manner, for a rational ethic purpose...
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homo sapiens at risk
ph34r.gif about the maths of the barmaid… (-;
the Principle of Equivalence between mass and curved acceleration means that a mass, is a region of accelerated space-time curved into a vortex. This the bar maid knows because she can use the equations of Einstein to describe the geometry of the fluid falling in the bath tub when she is taken a shower:lol:
And inversely we can use to simplify the equations of Einstein the simplest maths of vortex.
The strongest prove on that homology is the fact that the mass of an object at microscale is related to the angular momentum or spin or speed of rotation of the particle. So with that homology we can establish simple values for the fundamental masses of the Universe, considering them vortex regions of space-time ruled by the equation Min. Ro(space) x Max. Vo (mass)=K But since the electron has 10 times less vortex speed that the quark and exactly 10 times less mass, they prove the equivalence between angular momentum and mass.
Indeed the speed of the electron is 30.000 km./s, that is, a 10th of the speed of light, c/10. We hint that the quark and black hole that seems to be a superfluid of quarks has a rotational speed equal to that of light, c, in agreement with the decametric structure of the Universe. So we do some barmaid maths:

Down Quark (10 Mev) = Up quark (5 Mev) x Electron (0.5 Mev).

Thus it is obvious that the down quark splits in 2 equal particles in tems of mass-energy, one is the up quark, which trades his space (Ro) for an increasing of rotational speed=mass (v=C), and the other is the electron which trades its mass=rotational speed for his angular momentum (V=c/10),

But the simple mass relationships that quantum relativity prove go further. Because when we go into the next evolved mass particle, the strange quark, it turns out that it also holds a very simple decametic relationship The strange quark waits around 100 Mev. Thus we conclude again that the strange quark is either a vortex with Vo=10c and hence a micro-black hole in its own, or a bosonic state of down quarks with 10 piled up
Now, the barmaid maths explain why the barmaid is so frightened blink.gif by a black hole vortex. She thinks there will be 2 effects as in a tug of war, the effect predicted by Hawking and quantum theory: the electromagnetic universe, the electron vortex will try to evaporate the quark vortex at c/10 speed... and the effect predicted by Relativity, the mass vortex, the black hole or strangelet (just 2 phases of the increasing collapse of space time as their bigger companions the stellar neutron star and the black hole are), will try to suck in the electromagnetic space… Problem is that the mass vortex is denser and 10 times faster in mass-energy and so as the quark vortex expands its rotational disk at the speed of light, c, the electronic vortex evaporates only at a 10th of that speed the quark vortex. And so the bar maid did her kindergaten maths toshow what happens next.
The vortex is a mass wave that contracts electromagnetic space into quark space at C speed in the perimeter which is pi x ro, so the lineal expansion of the radius will be C/pi = 100.000 km/ second. It means that the black hole will accrete the earth which has a +10.000.km radius within 1/10th of a second. It will hence collapse the mass of the Earth in a tiny sugar cube within a fraction of a second and releasing the ‘wasted energy’ in a radiation wave creating a mini-nova as it does in the Universe constantly.
Of course, we can rest the effect of the hawking radiation which accretes the black hole at 1/10th of its speed . So that makes basically 1/10th slower the ‘mass wave’ caused by the black hole, to 1/9th of a second… Uhm, thanks to the hawking radiations we will live 1/10th of a second more… But That didnt make happy the barmaid. So she came out of the tub with an angst eureka
and asked Einstein... And he did the same calculations with hisfar more complex equations of general relativity and the results were similar…
The comparison with the fluid vortex is pertinent here. Basically a fluid vortex is made of molecules (the quarks) that sink in the energy of the water and phonons (the electromagnetic photons) that evaporate some of that energy. But of course the solid quarks, the solid water sinks in much faster than the gurgling sound evaporates. And the bar maid knows that because she likes to shower with hot water... and she likes to see the gurgling sound of the Niagara falls, so only when she sees the falls evaporating will concede that hawkings radiation can also evaporate a black hole vortex…It wont, the awesome, incredible power of a mass wave expanding will produce the exact effect we see in othe black holes, either star black holes or galactic black holes (quasars): an implosion of electromagnetic space-time that implodes and antisymretically an explosion of radiation that cleans, unwarps and expands space-time. In the case of the Universe those quasars expand space-time producing the expansion of the spacetime of the Universe we perceive in all light coming from all the central black holes of all galaxies…
We can do the math in a different way, using quantum time. A quantum time unit is 5x10-44 s. which could very likely the quantum time needed for a quark to create an event.
In physics it is considered that about that time gravity separated from electromagnetism, or what is the same, in that time period a mass wave of quarks accretes a quantum of the electromagnetic world. It might seem a very high speed of interaction but quarks interact very fact. We recently analyzed a meson decay that showed quarks and antiquarks mutating into each other trillion of times within a second. So if that interpretation of quantum time is correct, the mass wave will accrete quarks probably close to the quantum time speed, which means it will accrete in a second around 1044 quarks. Now the weight of the Earth gives us around 1.33*1050 atoms which is a million times bigger. So you might consider it will take a million seconds to do the accretion, around 10 days of life…. or if you do a more complex analysis, the mass wave will accrete faster, exponentially as it grows in mass and the area simultaneously accretes several quarks in each quantum time. Then again it is easy to show that the exponential growth of the area can reduce the expansion process of a mass wave to 1/10th of a second as the Earth becomes a nova.
ph34r.gif
ubavontuba
QUOTE (AlphaNumeric+Nov 7 2006, 12:27 PM)
You trust those people enough to fly in planes...

No. I trust the engineers that design and build airplanes. Particle physicists have nothing to do with it.

QUOTE
...or to build nuclear reactors.

Although this technology came about from particle physics, again, it's the engineering I trust, not the physicists. Even so, the worst that can happen is not all that disastrous (in a global sense). Chernobyl teaches us that life carries on, in spite of heavy radioactive contamination.

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...or to build nuclear reactors.

Although this technology came about from particle physics, again, it's the engineering I trust, not the physicists. Even so, the worst that can happen is not all that disastrous (in a global sense). Chernobyl teaches us that life carries on, in spite of heavy radioactive contamination.

Besides, if reactions of such power happen a lot in the upper atmosphere, then some reactions will produce black holes of neglibable momentum because they will collide with several particles within the Earth's atmosphere and ground, removing enough of their momentum to make them gravitationally bound to the Earth.

An assumption on your part. All of what you stated would remove too much kinetic energy to allow a blackhole to form.

If they do form as quickly as they think they might, they'll be blackholes long before they strike another particle. It physically can't happen as you describe it in this case. Calculate how many times the mass must double in the brief fraction of a second that it is transiting through the earth in order to be captured, and you'll find the required growth rate would swallow the earth in short order.

QUOTE
Yes, the probability of such collisions is low, as people how demonstrated when calculating how much material a long lasting proton sized black hole would capture, but it's still likely to have happened by now if black holes are produced in the atmosphere with any kind of regularity and they don't evaporate.

I disagree. The only way for this to happen is for two opposing cosmic particles to collide exactly relative to a gravitational body where the resultant NBH is captured in the gravity well. The odds of this happening is astronomical (to say the least). However, it can't be ruled out as a cause of many astronomical events.

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Yes, the probability of such collisions is low, as people how demonstrated when calculating how much material a long lasting proton sized black hole would capture, but it's still likely to have happened by now if black holes are produced in the atmosphere with any kind of regularity and they don't evaporate.

I disagree. The only way for this to happen is for two opposing cosmic particles to collide exactly relative to a gravitational body where the resultant NBH is captured in the gravity well. The odds of this happening is astronomical (to say the least). However, it can't be ruled out as a cause of many astronomical events.

Hence the "It happens all the time naturally" argument does actually have validity. Not in single particle collisions but when you consider multiple ones, then it is relevent.

Again, I disagree (see above).

QUOTE
If the initial amount of energy released was enough, then it would have burnt off a sizable amount of atmosphere. Yes, it wouldn't be self sustaining, but the output from the nuclear reaction would have supplied enough energy to be very dangerous for the immediate area, beyond just the heat shockwave.

The explosion would have to be so large as to blow off a sizable amount of the atmosphere. Otherwise atmospheric backfilling into the vacuum (left behind from the explosion and combustion) would simply refill it, quite rapidly.

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If the initial amount of energy released was enough, then it would have burnt off a sizable amount of atmosphere. Yes, it wouldn't be self sustaining, but the output from the nuclear reaction would have supplied enough energy to be very dangerous for the immediate area, beyond just the heat shockwave.

The explosion would have to be so large as to blow off a sizable amount of the atmosphere. Otherwise atmospheric backfilling into the vacuum (left behind from the explosion and combustion) would simply refill it, quite rapidly.

No, I'm not forgetting gravity, I know it would be pulled into the Earth.

But you are forgetting that the earth would push into it.

QUOTE
This isn't about the finer points of the SM, it's about the general concept of things like the Uncertainty Principle.

And I'm uncertain about the principle that this is safe (apologies to Groucho Marx).

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QUOTE
This isn't about the finer points of the SM, it's about the general concept of things like the Uncertainty Principle.

And I'm uncertain about the principle that this is safe (apologies to Groucho Marx).

I'm sorry, why exactly 'should' I? It's not my job to know everything in physics. I should know some things, things I'm expected to know for exams and for some research but that doesn't mean I should know everything.

You should because it pertains to the discussion at hand. I'm sure that you must understand the relationship between Hawking radiation and Unruh radiation. If one is shown not to exist, wouldn't that have potential repercussions to the other? Here's the link: http://www.phys.lsu.edu/faculty/oconnell/P...20Radiation.pdf

QUOTE
Prove they are exponential. Just because the growth rate is a function of the mass doesn't mean it's exponential. For instance, in Hawking radiation the rate of shrinking is related to the size of the black hole but the evaporation time is proportional to the cube of the mass and M(t) = \sqrt{M^3 - ct} (as seen in that pdf I posted) which is not exponential!

In the plainest english I can describe it: Think about a given gravity field strength as a "sphere of influence" around the NBH with a distance that correlates to the NBH mass. As the central mass grows, the size of your gravity sphere grows accordingly. It grows in all directions. If you think of these spheres of influence expanding outward as the mass increases, the area of your sphere of influence increases accordingly. Each time the gravity's sphere of influence grows, it is able to capture many times more mass than it could when it was just a little smaller. (I'll leave the math to folks who can do it without mucking it up).

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Prove they are exponential. Just because the growth rate is a function of the mass doesn't mean it's exponential. For instance, in Hawking radiation the rate of shrinking is related to the size of the black hole but the evaporation time is proportional to the cube of the mass and M(t) = \sqrt{M^3 - ct} (as seen in that pdf I posted) which is not exponential!

In the plainest english I can describe it: Think about a given gravity field strength as a "sphere of influence" around the NBH with a distance that correlates to the NBH mass. As the central mass grows, the size of your gravity sphere grows accordingly. It grows in all directions. If you think of these spheres of influence expanding outward as the mass increases, the area of your sphere of influence increases accordingly. Each time the gravity's sphere of influence grows, it is able to capture many times more mass than it could when it was just a little smaller. (I'll leave the math to folks who can do it without mucking it up).

Even if it is exponential, that doesn't mean the consumption time for the Earth is a 'short time', it can still be exponential and take trillions of years.

Sure. So far I haven't seen anyone calculate it that way though. Besides, how can you realistically calculate the absorption rate of an unknown?
homo sapiens at risk
ph34r.gif uhm ubavontuva, i think the thread agonizes dry.gif probably mystery is right, and the cern people will do their routine regardless of any theoretical argument, speculative or realist with math or logic with new or old theories... and politicians wont believe... it would be better to take a sabbatical and enjoy the earth... in front of so much foolness... one tends to think in the reverse anthropic principle, we are a race of nutty people with an absurd arrogance which never will see the schopenhauer fact: men are a mush on the surface of a speck planet in a corner of the universe, departing from those facts...' but who care about facts... the fact is that strangelets and its particles are the most stable, the center of the decuplet and octet, the natural 'predators' if you want to use biological terms of the particle's zoo... but for physicists with his abstract numbers there are no collateral damages... cause numbers have killed already the vitality of the Universe... the project here is on track but it is just a ripple in the ocean of indifference and irresponsability, take care and enjoy the redwoods ph34r.gif
ubavontuba
QUOTE (rpenner+Nov 7 2006, 07:59 PM)
I have justified my use of a linear growth rate for this non-GR black hole of R=10^-4 fermis with an argument quoted above. "but I put it to you that the black hole would not have grown proportionally in size, since the theory of gravity being used is not GR, but some high-dimensional theory." Let me point out, as should be obvious, that any non-GR theory of gravity needs to eventually meet the predictions of GR as the black hole becomes more massive, and in ignorance of the exact relationship between mass and radius, I assumed radius was constant until the mass was sufficient for a GR-black hole to have a radius of 10^-4 fermis, which is both consistent with the principles of high-D theories as I understand them and the most parsimonious prediction given that you have no other sources to back up this model. Thus, from 20TeV to 4x10^25 EeV I predict R=10^-4.

I'm sure your math is quite rigorous. However it is biased. You are arguing from the best case scenario you can describe. In this instance, it is the worst case scenario that needs consideration. What if your assumptions are false?

QUOTE
The pressure at the earth's core is negligible at the scale of 10^-4 fermis, as is the Earth's gravity everywhere.


In an atomic bonding sense, yes. However, The NBH may be able to knock the "legs" out from under the particles it approaches.

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The pressure at the earth's core is negligible at the scale of 10^-4 fermis, as is the Earth's gravity everywhere.


In an atomic bonding sense, yes. However, The NBH may be able to knock the "legs" out from under the particles it approaches.

The use of the average density of the Earth is completely justified, as I have assumed the worst trajectory and the exact calculation of "sampled" average density cannot differ from mine by more than a factor of 2 and my scenario is many orders of magnitude from being a disaster.


Again, the best case you can describe. It's not about the best case.

QUOTE
If you are less ignorant, I have invited you to respond with your calculations. "Perhaps they would counter with their calculations."


I have admitted that I haven't the sophisticated math skills to create a worhty mathematical argument. Instead, I opt for logic. Feel free to point out flaws in my logic.

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If you are less ignorant, I have invited you to respond with your calculations. "Perhaps they would counter with their calculations."


I have admitted that I haven't the sophisticated math skills to create a worhty mathematical argument. Instead, I opt for logic. Feel free to point out flaws in my logic.




  1. You have no evidence that the possibility exists that any CERN black holes will be produced with less than escape velocity. 10^-4 fermis is a very small sample of each proton and even if every one of your assumptions above is correct, you can't get around the evidence that protons are not point particles but have a rich structure, dominated by nearly free (at these scales) quarks moving near the speed of light.

Sure, but the most energetic collisions must be dead on collisions. Glancing blows will not have sufficient energy to form NBHs. This is why only a small statistical amount of the material is expected to become NBHs.

QUOTE
I clearly was talking about the proven longevity of much denser neutron stars, where a 10^-4 fermi radius tunnel would mass more. 3.14 * 10^-28 cc * 10^14 g/cc = 3.14 * 10^-14 g = 20 billion amu = 20 million TeV = 1 million times the mass of the hypothesized hole. That's a lot of stopping power and to be consistent your comments on pressure and gravity (where valid) surely apply more to the neutron star. (likewise white dwarf, etc)

Okay, but the initial NBH is so small that it's weakly interacting (like nuetrinos). It might grow a bit before emerging with (still) escape velocity, but it has less than a second to do it. Besides, there's no proof that nuetron stars don't collapse as a result of such events. How come nuetron stars aren't (apparently) highly abundant in the galaxy?

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I clearly was talking about the proven longevity of much denser neutron stars, where a 10^-4 fermi radius tunnel would mass more. 3.14 * 10^-28 cc * 10^14 g/cc = 3.14 * 10^-14 g = 20 billion amu = 20 million TeV = 1 million times the mass of the hypothesized hole. That's a lot of stopping power and to be consistent your comments on pressure and gravity (where valid) surely apply more to the neutron star. (likewise white dwarf, etc)

Okay, but the initial NBH is so small that it's weakly interacting (like nuetrinos). It might grow a bit before emerging with (still) escape velocity, but it has less than a second to do it. Besides, there's no proof that nuetron stars don't collapse as a result of such events. How come nuetron stars aren't (apparently) highly abundant in the galaxy?

Moreever, as these are eternal, then the post-neutron star black holes must persist even if not slowed down to below escape velocity, and should form part of the background radiation.

As I've suggested in the past, darkmatter WIMPs match this model (if they don't radiate).

QUOTE
According to your assumptions, all these cosmic origin mini black holes from 20TeV through 300EeV are eternal, but high energy particles are detected by the results of their highly luminous (in the particle physics sense) collisions and decay products thereof. Nothing "collides" with these non-GR black holes, but they are simply captured. Thus evidence of a 300EeV particle is evidence for the collision of a 300EeV particle, and thus evidence against the Earth being so fragile.

How can nothing collide with a particle moving at almost half the speed of light, and yet be captured by the earth? What magic force does this?

Anyway, glancing blows are going to be detected. NBH forming collisions might go unnoticed. Perhaps only a couple quarks form the NBH and the rest collide in a shower of parton distribution. You, yourself pointed out the grainy structure of these particles, remember? They're collisions are likely to be quite messy. Like I pointed out earlier, only a small percentage is likey to form NBHs.

I'm not the only one concerned. Here's a site:
http://www.risk-evaluation-forum.org/luisada1.htm

"The upcoming Large Hadron Collider (LHC) at CERN could be dangerous. It could produce potentially dangerous particles such as mini black holes, strangelets, and monopoles."

Even the "experts" have doubt:
http://theory.gsi.de/~vanhees/publ/cup.pdf

"John Nelson, professor of nuclear physics at Birmingham University who is leading the British scientific team at RHIC, said the chances of an accident were infinitesimally small - but Brookhaven had a duty to assess them. ”The big question is whether the planet will disappear in the twinkling of an eye.
It is astonishingly unlikely that there is any risk - but I could not prove it,” he said. The London Times, July 18, 1999"

This is a list of papers. Note this particular reference to CERN's own study and the part that says, "The idea that Hawking radiation might not work is not explored."

http://www.risk-evaluation-forum.org/links.htm

"J.-P. Blaizot, J. Iliopoulos, J. Madsen, G.G. Ross, P. Sonderegger, and H.-J. Specht, "Study Of Potentially Dangerous Events During Heavy-Ion Collisions At The LHC: Report Of The LHC Safety Study Group" CERN, 2003 http://doc.cern.ch/yellowrep/2003/2003-001/p1.pdf This is a CERN risk assessment study. It considers many scenarios, and concludes that there is no risk. However, it assumes that mini black holes will evaporate by thermal processes (Hawking radiation), and concludes that there is no danger. (See page 12, equation 18.) The idea that Hawking radiation might not work is not explored. Also, while discussing cosmic rays the report concludes that "the worst-case scenario cannot be excluded based on these data alone."

So, is there reason to be concerned? I think so. You may disagree all you want, but the concern is apparently a valid one.
ubavontuba
QUOTE (homo sapiens at risk+Nov 10 2006, 08:27 AM)
ph34r.gif uhm ubavontuva, i think the thread agonizes dry.gif probably mystery is right, and the cern people will do their routine regardless of any theoretical argument, speculative or realist with math or logic with new or old theories... and politicians wont believe... it would be better to take a sabbatical and enjoy the earth... in front of so much foolness... one tends to think in the reverse anthropic principle, we are a race of nutty people with an absurd arrogance which never will see the schopenhauer fact: men are a mush on the surface of a speck planet in a corner of the universe, departing from those facts...' but who care about facts... the fact is that strangelets and its particles are the most stable, the center of the decuplet and octet, the natural 'predators' if you want to use biological terms of the particle's zoo... but for physicists with his abstract numbers there are no collateral damages... cause numbers have killed already the vitality of the Universe... the project here is on track but it is just a ripple in the ocean of indifference and irresponsability, take care and enjoy the redwoods ph34r.gif

"Never give up! Never surrender!" -Galaxy Quest

If I can plant a seed of doubt in one person, in the right place to ask the right questions, then it's a worthy fight.
ubavontuba
QUOTE (rpenner+Nov 8 2006, 06:33 AM)
The only possible (mutually incompatible) meanings to come from this thread is for ubavontuba to make his case strong enough to convince even one particle physicist, and ideally a large number of them or for ubavontuba to follow an offered line of reasoning and come to the conclusion that there is plenty of evidence that the experiment is safe.

I opt for the former. I find no evidence that the experiment is safe, only conjecture (with differing levels of sophistication).

QUOTE
In fact, ubavontuba is not the first to raise these fears, but has not offered any persuasive demonstration

But it shouldn't be for me to prove a danger, it should instead be the responsibility of the physics community to prove it's safe. Some individuals have acknowledged my argument concerning the conservation of momentum as being accurate. They then just fall on the Hawking radiation argument and/or the absorption rate argument. Why aren't they concerned that CERN made such a blunderous argument for safety to begin with? This error is incomprehensibly huge in light of the risk!


    QUOTE (->
    QUOTE
    In fact, ubavontuba is not the first to raise these fears, but has not offered any persuasive demonstration

    But it shouldn't be for me to prove a danger, it should instead be the responsibility of the physics community to prove it's safe. Some individuals have acknowledged my argument concerning the conservation of momentum as being accurate. They then just fall on the Hawking radiation argument and/or the absorption rate argument. Why aren't they concerned that CERN made such a blunderous argument for safety to begin with? This error is incomprehensibly huge in light of the risk!



    • that it is possible to create a 20 TeV/c^2 black hole,

      I have cited evidence that this may have already happened at the RHIC.

      QUOTE

    • that a black hole of mass 20 TeV/c^2 has a lifetime in excess of 100 years,

    No one has ever seen one evaporate. Prove to me they do (it's just as valid as your argument). Besides, I have cited a number of papers pertaining to this.

    QUOTE (->
    QUOTE

  • that a black hole of mass 20 TeV/c^2 has a lifetime in excess of 100 years,

  • No one has ever seen one evaporate. Prove to me they do (it's just as valid as your argument). Besides, I have cited a number of papers pertaining to this.


  • that a 20 TeV/c^2 hole has a capture cross section larger than 10^-4 fermi (or even larger than 10^-35 meters (10^-20 fermi)),

    Prove to me it doesn't (just as valid). Besides, how big is gravity? It's range is hypothetically as large as the universe.

    QUOTE

  • that the pressure of the earth's core will have more than an order of magnitude effect on intake rate for such a small hole,

  • You have no way of knowing what the actual absorption rate might be. Gravity bends space, time, energy, and even matter to fit.

    QUOTE (->
    QUOTE

  • that the pressure of the earth's core will have more than an order of magnitude effect on intake rate for such a small hole,

  • You have no way of knowing what the actual absorption rate might be. Gravity bends space, time, energy, and even matter to fit.


  • that a significant portion of inelastic proton-proton collision products exist at less than Earth escape velocity,

    My argument was that they can't, if they form stable blackholes.

    QUOTE

  • that if 20 TeV holes were easy to form in the lab, stars (of all types) could somehow have a lifetime in excess of 10 billion years despite the fact that they have much greater escape velocity and areal density than the Earth

  • Because the conservation of momentum laws still exist. Due to the higher density and gravity, they fall in faster, transit faster, and leave with nearly the same resultant escape velocity as ones striking the earth.

    QUOTE (->
    QUOTE

  • that if 20 TeV holes were easy to form in the lab, stars (of all types) could somehow have a lifetime in excess of 10 billion years despite the fact that they have much greater escape velocity and areal density than the Earth

  • Because the conservation of momentum laws still exist. Due to the higher density and gravity, they fall in faster, transit faster, and leave with nearly the same resultant escape velocity as ones striking the earth.


  • that collision of 20 TeV-300EeV cosmic rays with stars over cosmological time would not produce a background of nano-holes of all velocities and therefore dooming the Earth regardless of CERN.

    My argument is that they would always have high relative velocities with the earth. Therefore, they can have relatively high velocities with the galaxy (possibly forming our dark matter halo) or little relative velocity (fall into our enormous, central black hole).


QUOTE
Since everything we know about black holes comes physics calculations, it is curious that ubavontuba's fears do not rest on even one of the listed demonstrations.

On the contrary, I have argued every point.
AlphaNumeric
QUOTE (homo sapiens at risk+Nov 10 2006, 01:41 AM)
So alpha, stop oppossing us and pass it to your students and professors at cambridge, you are in the center of 'physicists authority' (im not, im on the fringes of accepted theory)... Come on lets move, life is too sweet to degenerate it into an ice-9 cube. I disagree with some of you

Firstly, I'm not at Cambridge and even if I was, I doubt I know more about this stuff than the lecturers there.

Secondly, did you read the section I pointed you to in that paper? Where the authors themselves, who derived negative stranglet existence, say it's not possible for them to act as catalysts to turn the Earth into a giant stranglet? Hence I'd say it's hardly a nail in the coffin of the LHC.

As for the rest of your pseudophysics in the post that followed, why are you telling us? Why aren't you telling the scientific communit? Getting it published? Instead you waste your time typing up arm waving arguments with little to no justification for your conclusions to people who either don't understand it or don't care to understand it and definitetly can't do anything about it!

If you're as great as you say, you'd know the utter pointless effort you're putting into to telling a bunch of nobodies (including myself) online. This just all the more convinces me you aren't the great physicist you claim because you'd not be wasting your time with us if you truely believed CERN was going to destroy the Earth, you have the physics to prove it and you have the contacts in the academic community to spread the word. Send an open letter to your collegues, give a lecture on it at a big conference (if you're that good, any conference will want you to attend). You've plenty of REAL options open to you, but no, you come online to a fairly small physics website and bitch about it to people who mostly don't even know general relativity or quantum theory, never mind the high end stuff.

Wow, for a top 10 in the world guy you really are pretty stupid.
QUOTE (ubavontuba+Nov 10 2006, 08:42 AM)
An assumption on your part.  All of what you stated would remove too much kinetic energy to allow a blackhole to form.

If they do form as quickly as they think they might, they'll be blackholes long before they strike another particle.  It physically can't happen as you describe it in this case.  Calculate how many times the mass must double in the brief fraction of a second that it is transiting through the earth in order to be captured, and you'll find the required growth rate would swallow the earth in short order.
No it won't. As Rpenner as already demonstrated, you don't get anywhere near the cataclysmic growth rate you're claiming. Even with a model which grows faster than his, you're still looking at times MUCH longer than the Sun will live for. If you disagree, show your calculations. It's very easy to say "You're wrong", lets see some evidence!

You also misunderstood what I said. If black holes of high momentum are formed all the time by the cosmic radiation hitting the upper atmosphere than statistically some of them will be slowed by hitting othe particles of the Earth enough to there already be black holes at the centre of our planet right now (assuming they don't evaporate). Plus, when you consider how much denser things like neutron stars are, they would be many orders of magnitude more likely to be turned into a black hole by such interactions with cosmic rays, yet we see them everywhere.
QUOTE (ubavontuba+Nov 10 2006, 08:42 AM)
In the plainest english I can describe it
You, like other people on this site, suffer from the mistaken impression that giving an armwaving derivation allows you to make precise mathematical statements. It's possible for systems to obey the quanlative description "The rate of change increases is the amount itself increases" without being exponential. Plenty of systems show such a behaviour. Hence, using a decription to get to that end result DOESNT imply you can say it's exponential.

Show it by maths or you've got nothing but a guess.
QUOTE (ubavontuba+Nov 10 2006, 08:42 AM)
I have cited evidence that this may have already happened at the RHIC.
You mean this : http://arxiv.org/abs/hep-th/0501068. I'm not surprised you aren't familiar with the notion of 'dual', since it's a topic which is doctorate level or above and is tied up in something called AdS/CFT correspondence. The fireball was not literally a black hole but could be described as one under the AdS/CFT correspondence in the dual theory.

Nice try but no cigar.
ubavontuba
QUOTE (AlphaNumeric+Nov 10 2006, 11:34 AM)
No it won't. As Rpenner as already demonstrated, you don't get anywhere near the cataclysmic growth rate you're claiming. Even with a model which grows faster than his, you're still looking at times MUCH longer than the Sun will live for. If you disagree, show your calculations. It's very easy to say "You're wrong", lets see some evidence!

You seemingly misunderstand. I agree that they can't grow that fast. I'm only pointing out that for them to be captured by the earth, they must grow that fast in order to be captured at all. Again, my argument is that this can't happen. Therfore the argument from CERN that it happens all the time naturally, is invalid. If it does happen naturally, they can't be captured (unlike the manmade version). They simply zing away into space. The two models don't correlate.

QUOTE
You also misunderstood what I said. If black holes of high momentum are formed all the time by the cosmic radiation hitting the upper atmosphere than statistically some of them will be slowed by hitting othe particles of the Earth enough to there already be black holes at the centre of our planet right now (assuming they don't evaporate).

No. They would have to grow about 53,000 times their initial mass in about .017 second to be captured. They simply cannot grow this fast (they're initially too weakly interacting), therefore your argument is irrelevant.

QUOTE (->
QUOTE
You also misunderstood what I said. If black holes of high momentum are formed all the time by the cosmic radiation hitting the upper atmosphere than statistically some of them will be slowed by hitting othe particles of the Earth enough to there already be black holes at the centre of our planet right now (assuming they don't evaporate).

No. They would have to grow about 53,000 times their initial mass in about .017 second to be captured. They simply cannot grow this fast (they're initially too weakly interacting), therefore your argument is irrelevant.

Plus, when you consider how much denser things like neutron stars are, they would be many orders of magnitude more likely to be turned into a black hole by such interactions with cosmic rays, yet we see them everywhere.

Conservation of momentum works the same everywhere. As a weakly interacting particle, NBHs would tend to pass right on through. Do you think neutron stars effectively block neutrinos (they emit them!)? Unlike neutrinos though, they might grow if they are gravitationally captured.

QUOTE
You, like other people on this site, suffer from the mistaken impression that giving an armwaving derivation allows you to make precise mathematical statements. It's possible for systems to obey the quanlative description "The rate of change increases is the amount itself increases" without being exponential. Plenty of systems show such a behaviour. Hence, using a decription to get to that end result DOESNT imply you can say it's exponential.

Okay, fine. How about: The NBH might grow faster and faster, at an ever increasing rate, until the earth is consumed (non-linear growth)?

QUOTE (->
QUOTE
You, like other people on this site, suffer from the mistaken impression that giving an armwaving derivation allows you to make precise mathematical statements. It's possible for systems to obey the quanlative description "The rate of change increases is the amount itself increases" without being exponential. Plenty of systems show such a behaviour. Hence, using a decription to get to that end result DOESNT imply you can say it's exponential.

Okay, fine. How about: The NBH might grow faster and faster, at an ever increasing rate, until the earth is consumed (non-linear growth)?

Show it by maths or you've got nothing but a guess.

Show me by maths that my statements in regards to the conservation of momentum argument and the potentially increasing growth rate are false. Again, I feel it is the physics community's responsibility to prove it is safe, not mine to prove it is dangerous.

QUOTE
You mean this : http://arxiv.org/abs/hep-th/0501068. I'm not surprised you aren't familiar with the notion of 'dual', since it's a topic which is doctorate level or above and is tied up in something called AdS/CFT correspondence. The fireball was not literally a black hole but could be described as one under the AdS/CFT correspondence in the dual theory.

Right. It is my opinion that it probably wasn't a blackhole too. I've stated this before. However, it is evidentiary to the possibility that blackholes might be created at CERN (the context in which I mentioned it).
dboots
Question

Unless you have the right microscope equipment, how are most of the physics
world going to be able to discern a black hole from a possible "nano bubble"
of nanotechnology
Isn't one of the problems facing this new technology are the concerns of how to
assemble atoms and molecules into smart materials and working devices???
To me the real scary implications is the ability to assemble new atoms and molecules and their pieces into the synthesis of organic molecules thereby creating different molecular structures. Who is going to be able to tell the
difference if it is a true black hole unless you have the capabilities to send a
probe through it????

I am just a layperson, so please do not slam me.

dboots
homo sapiens at risk
ph34r.gif the general error is to treat a mass, a black hole as a particle, it is a point of quantum time=gravity in minimal space... all comes like the higgs hoax from the fact that those people working in high energy are particle quantum people and pretend to unify what is not unifiable, as you need duality to create a ccoplex universe, you need a lineal quantum force and a cyclical vortex, and the 2 limits are light lineal speed c and cyclical c vortex speed (the black hole) within those limits our Universe exists ph34r.gif
dboots
Homo sapien

Did you miss the part where I said I was a layperson??

Can you try that again in English. But as far as I can tell you did not
refute anything that I questioned. You just went off about quantum physics
which is part of nanotechnology.

dboots
rpenner
QUOTE (ubavontuba+Nov 10 2006, 06:57 PM)
No.  They would have to grow about 53,000 times their initial mass in about .017 second to be captured.  They simply cannot grow this fast (they're initially too weakly interacting), therefore your argument is irrelevant.

I don't see your calculations for 5.3x10^4, but....

Being consistant, isn't that proof that if 20 TeV black holes are stable, then the 20 million TeV -mass cylinder that a 10^-4 fermi black hole would carve out of neutron star result in slowing down below the neutron star's much higher escape velocity?

Moreever, if they are in fact eternal as you insist, then each interaction with a planet or a star or molecular cloud should tend to slow them down, first below the galaxies escape velocity, then the Suns, and finally the Earths. 20TeV cosmic rays are common, and the Earth has been here for billions of years.

QUOTE (ubavontuba+Nov 10 2006, 06:57 PM)
Conservation of momentum works the same everywhere. As a weakly interacting particle, NBHs would tend to pass right on through. Do you think neutron stars effectively block neutrinos (they emit them!)? Unlike neutrinos though, they might grow if they are gravitationally captured.


QUOTE (ubavontuba+Nov 10 2006, 09:06 AM)
Okay, but the initial NBH is so small that it's weakly interacting (like nuetrinos). It might grow a bit before emerging with (still) escape velocity, but it has less than a second to do it. Besides, there's no proof that nuetron stars don't collapse as a result of such events. How come nuetron stars aren't (apparently) highly abundant in the galaxy?

That is completely the wrong definition of weak interaction. What you want to talk about is capture cross-section. In other places you assume because it is a black hole, it has strong gravity, but this is not demonstrated to the case for a non-GR theory. Indeed you have to assume weak gravity to prove stability.

As for the number of neutron stars, it is probably upwards of 100,000 in our galaxy. Many of them we can date precisely by direct means.

PSR B0950+08, at a distance of 260 parsecs, is the oldest known neutron star that still radiates, and is 17 million years old, slowly cooling from the heat of its formation. It's magnitude 20, just barely visible. PSR J2144-3933 is much older and much slower. Both are among the 1500 or so pulsars we know about, leading to the conclusion that the galaxy is packed with them. The LIGO people are even estimating the frequency in which two neutron stars collide just because of the unusual graviational radiation signature of the event.

http://www.jb.man.ac.uk/~pulsar/Education/...al/tut/tut.html

Zavlin, V. E. and Pavlov, G. G., The Astrophysical Journal, Nov. 2004. 616 (1) pp. 452-462.

http://www.mhhe.com/physsci/astronomy/uspe...01_uspeak.mhtml
homo sapiens at risk
ph34r.gif its all dependant on what theory you use, those are quantum calculations considering a black hole a particle. But it is not a normal particle:
1- it probably doesnt move as its c-speed of rotation makes impossible further lineal movement or it will break the relativity postulate.
2. If you use quantum space-time, it means it will warp space-time spins=masses and strings=electromagnetic radiation at c-speed.
3- This is what experimental proves show. We have just seen one feeding on iron atoms turning at light speed.
4. It explains also why Guth considers the big bang the explosion of a mini black hole at planck scae.
5. Why novas explode with a light speed of accretion probably born also from a singularity.
6. I am perplexed indeed, of the things im reading on this theme. Even in QST is still peripherical, Do quantum theorists learn relativity? Please a little bit of respect for the master... a black hole doesnt behave like a particle it is a sink that warps space-time ph34r.gif
ubavontuba
QUOTE (rpenner+Nov 11 2006, 01:11 AM)
I don't see your calculations for 5.3x10^4, but....

Being consistant, isn't that proof that if 20 TeV black holes are stable, then the 20 million TeV -mass cylinder that a 10^-4 fermi black hole would carve out of neutron star result in slowing down below the neutron star's much higher escape velocity?

No. Does it stop your average neutrino? Why not? Admittedly it stops some neutrinos, but a neutrino isn't an NBH.

QUOTE
Moreever, if they are in fact eternal as you insist, then each interaction with a planet or a star or molecular cloud should tend to slow them down, first below the galaxies escape velocity, then the Suns, and finally the Earths. 20TeV cosmic rays are common, and the Earth has been here for billions of years.


I think the conservation of angular momentum may be what saves us. They should tend to go either to the darkmatter halo (or escape), or into the central blackhole core. It's possible that galaxies with insufficient angular momentum do get eaten up by these things. Have you heard of the recently discovered darkmatter galaxies? Why do you suppose they're dark?

QUOTE (->
QUOTE
Moreever, if they are in fact eternal as you insist, then each interaction with a planet or a star or molecular cloud should tend to slow them down, first below the galaxies escape velocity, then the Suns, and finally the Earths. 20TeV cosmic rays are common, and the Earth has been here for billions of years.


I think the conservation of angular momentum may be what saves us. They should tend to go either to the darkmatter halo (or escape), or into the central blackhole core. It's possible that galaxies with insufficient angular momentum do get eaten up by these things. Have you heard of the recently discovered darkmatter galaxies? Why do you suppose they're dark?

That is completely the wrong definition of weak interaction. What you want to talk about is capture cross-section. In other places you assume because it is a black hole, it has strong gravity, but this is not demonstrated to the case for a non-GR theory. Indeed you have to assume weak gravity to prove stability.


I'm trying to keep it simple. Basically, I feel that these things might be so small and fast that regular matter hasn't enough time to interact with them.

QUOTE
As for the number of neutron stars, it is probably upwards of 100,000 in our galaxy. Many of them we can date precisely by direct means.


These questions puzzle me:
100,000 seems like a lot, but what is this in percentage compared to ordinary stars? Where are all the hulks leftover from the first and second generations of stars? Shouldn't they outnumber the current count (or at least represent a more substantial population)? Obviously they'd be too cold by now to see. But it seems to me that we should see evident binary action all over the place, right? Collision evidence too, right?

QUOTE (->
QUOTE
As for the number of neutron stars, it is probably upwards of 100,000 in our galaxy. Many of them we can date precisely by direct means.


These questions puzzle me:
100,000 seems like a lot, but what is this in percentage compared to ordinary stars? Where are all the hulks leftover from the first and second generations of stars? Shouldn't they outnumber the current count (or at least represent a more substantial population)? Obviously they'd be too cold by now to see. But it seems to me that we should see evident binary action all over the place, right? Collision evidence too, right?

PSR B0950+08, at a distance of 260 parsecs, is the oldest known neutron star that still radiates, and is 17 million years old, slowly cooling from the heat of its formation. It's magnitude 20, just barely visible. PSR J2144-3933  is much older and much slower. Both are among the 1500 or so pulsars we know about, leading to the conclusion that the galaxy is packed with them. The LIGO people are even estimating the frequency in which two neutron stars collide just because of the unusual graviational radiation signature of the event.


Yeah. It would be really neat to detect such a collision. It might prove (or not) the existence of gravity waves.

QUOTE
http://www.jb.man.ac.uk/~pulsar/Education/...al/tut/tut.html

Zavlin, V. E. and Pavlov, G. G., The Astrophysical Journal, Nov. 2004. 616 (1) pp. 452-462.

http://www.mhhe.com/physsci/astronomy/uspe...01_uspeak.mhtml


Nice resources. Thanks.
homo sapiens at risk
ph34r.gif dark matter galaxies are dark because their black holes have swallowed in all the stars and planets. A black hole of the size of the moon the most current size of planetoids has 2.7 k and is a black body which emits thermal radiation equal to that of the background radiation. Since the bg bang is local and doesnt leave shadows on galaxies, it follows that the halo is made of black holes the size of the moon so small as particles that redshift light creating the background raddiation'This also explains the olbert paradox. The rest of the light sucks in. We are in an evolutionay system similar to a cell, called a galaxy, simple but effective, in teh center a huge black hole, in the outskirts a halo of small ones, in the middle the mithocondria that feeds them. 'Man is a mush on the surface of a rock in teh corner of a galaxy, departing from those facts we can talk about us' Schopenhauer. ph34r.gif
homo sapiens at risk
ph34r.gif So i suggest to build instead of that collider a super telescope on the moon and check that halo first, if black holes evaporate in the halo give the nobel to hawk, if we see them stable, sad.gif blow up the cern with the usual charge of well tested dynamite of the same Saint Nobel of the wannabe god-scientists. You cannot play with death. She always accepts the bet.

A chess table. 2 characters.
Block: ‘You choose’
Death picks up a pawn.
Death: ‘Black, very appropiate, dont you think? You play first.’
(Block unwittingly makes his move)

The 7th seal. Ingmar Bergman


ph34r.gif
RealityCheck
QUOTE (ubavontuba+Nov 11 2006, 06:31 AM)
...
...
I'm trying to keep it simple.  Basically, I feel that these things might be so small and fast that regular matter hasn't enough time to interact with them.
...
...


Hi uba! Just popped in to comment regarding your point about cross-section/time for interactions between Nano BHs and 'ordinary matter".

IIRC, I pointed out some time ago in one of your threads that COSMIC RAY COLLISION-sourced NBHs that have a 'charge', and ones with 'magnetic fields', would interact with the charges/magnetic fields of massive bodies just like any other charged particle. And so may be either accelerated/decelerated depending on the circumstances. Many would be decelerated to 'trapping' velocities by white dwarf stars, neutron stars, supergiant stars (and perhaps even 'standard-mass' stars and large Jupiter-Plus sized planets having magnetic fields).

I would point out that many ULTRA-HIGH-ENERGY 'head on' cosmic ray collisions BETWEEN EQUALLY/UNEQUALLY ENERGETIC cosmic rays would be slightly off-centre so that, while they still introduce sufficient energy-density in the 'event centre' to produce ALLEGED NBH, their ANGULAR MOMENTUM as a result would 'bleed' much LINEAR MOMENTUM; which would ensure 'trapping' and 'interacting' capabilities as per your 'worst' scenario.

But I most want to point out that any 'interactions' by NBHs with ANYTHING ELSE is ALSO via ITS CLOSER-IN and STEEPER GRAVITY WELL GRADIENT which is DISPROPORTIONATE in its vicinity, and hence the possibility of GRAVITATIONAL CAPTURE BY the NBH OWN gravity field, of "ordinary" matter/fields which OTHERWISE may not have 'interacted' in the 'ordinary way'.

So even ESCAPE VELOCITY NBHs that are too small and that would not have time to react in the ordinary way, should STILL have a 'comet-like' HALO/TRAIL of 'extreme gravity captured' "ordinary" particles (whether charged or uncharged).

Much like what we see with BH-and-ORDINARY STAR binary systems where the 'trail' is from the ordinary star to the BH companion.

A CORRESPONDINGLY SCALED ordinary-matter halo/trail should therefore also accompany even a small/speedy (putative) NBH speeding through massive matter bodies and OUT again because of its unusual GRAVITATION REACTION profile.....

..which profile is NOT "ordinary" as in "ordinary-with-ordinary" matter-reaction scenarios. So while it MAY BE that NBH may NOT react in the "ordinary" cross-section/speed 'profile' way with matter, it MAY DO SO in other ways; because of the GRAVITATIONAL 'profile' which 'captures' a halo/trail which would be obvious, and would be a perfect 'feeding' system for such NBHs to GROW (and also SLOW) non-linearly I think.

But most of all, I wish to point out that even a (putative) NBH travelling AT SPEED in the same trajectories with OTHER cosmic ray matter will (RELATIVE TO THAT ORDINARY MATTER) be essentially SLOW/STATIONARY enough to 'feed' to their heart's content.

So again, if such (putative) NBHs do NOT 'evaporate immediately they are formed, as you fear, they will still have ample opportunities to gravitationaly capture and feed upon ordinary matter EVEN AT HIGH VELOCITY TRAJECTORIES....both on dense 'stationary' matter AND matter travelling in corresponding velocities/trajectories.


All of which again means that our universe shouldn't look as it does because most massive bodies would have become BHs before now.


That's it from me, uba. I hope this input provides some original food for further thought/discussion in this very intellectually-stimulating thread. I'll surf back through in a few days to see what the effects were. Cheers!

RC.
.
dboots
Homo Sapien

I realize you were not talking to me before when I addressed you.
I am sorry I assumed you were answering my reference.


dboots
dboots
Homo Sapien

Got a question. It occurs to me the USA is doing a lot of researching when it
comes to the Planet of Mars. Is it possible that they find something on that planet,
that they are not telling us about? Is it possible they found a type of sulfur
proton/atom that made it very viable with the gold nuclei?????
AlphaNumeric
^ What exactly would a sulphur proton be? And what has it got to do with gold?

You're now vearing away from science (not that Homosapiens@Risk was ever close to it) and into conjecture and conspirary theories. Maybe they found aliens on Mars and are negotiating with them to get mind control technology to enslave us all!! rolleyes.gif
dboots
Numeric Tel

Don't quit you night job. Evidently your day job doesn't pay enough.
ubavontuba
QUOTE (RealityCheck+Nov 11 2006, 09:57 PM)

Hi uba! Just popped in to comment regarding your point about cross-section/time for interactions between Nano BHs and 'ordinary matter".

IIRC, I pointed out some time ago in one of your threads that COSMIC RAY COLLISION-sourced NBHs that have a 'charge', and ones with 'magnetic fields', would interact with the charges/magnetic fields of massive bodies just like any other charged particle. And so may be either accelerated/decelerated depending on the circumstances. Many would be decelerated to 'trapping' velocities by white dwarf stars, neutron stars, supergiant stars (and perhaps even 'standard-mass' stars and large Jupiter-Plus sized planets having magnetic fields).

Maybe, supposing they retain a charge. Maybe not (do we know for sure that they can have a charge?). Some astronomical blackholes exhibit magnetic field characteristics. But this is not the same as an atomic charge.

QUOTE
I would point out that many ULTRA-HIGH-ENERGY 'head on' cosmic ray collisions BETWEEN EQUALLY/UNEQUALLY ENERGETIC cosmic rays would be slightly off-centre so that, while they still introduce sufficient energy-density in the 'event centre' to produce ALLEGED NBH, their ANGULAR MOMENTUM as a result would 'bleed' much LINEAR MOMENTUM; which would ensure 'trapping' and 'interacting' capabilities as per your 'worst' scenario.


I disagree with this as a general principle because matter inhabits such a small proportion of space. The possibility that this happens at just the right place, at just the right time, with the exact properties needed to enable capture, seems quite improbable. It might happen, but I think it'd likely be rare. As I've said before though, we can't know that this isn't a precursor to numerous astronomical events. Perhaps this is the trigger that causes neutron stars to collapse and radiate those amazing gamma-ray bursts.

QUOTE (->
QUOTE
I would point out that many ULTRA-HIGH-ENERGY 'head on' cosmic ray collisions BETWEEN EQUALLY/UNEQUALLY ENERGETIC cosmic rays would be slightly off-centre so that, while they still introduce sufficient energy-density in the 'event centre' to produce ALLEGED NBH, their ANGULAR MOMENTUM as a result would 'bleed' much LINEAR MOMENTUM; which would ensure 'trapping' and 'interacting' capabilities as per your 'worst' scenario.


I disagree with this as a general principle because matter inhabits such a small proportion of space. The possibility that this happens at just the right place, at just the right time, with the exact properties needed to enable capture, seems quite improbable. It might happen, but I think it'd likely be rare. As I've said before though, we can't know that this isn't a precursor to numerous astronomical events. Perhaps this is the trigger that causes neutron stars to collapse and radiate those amazing gamma-ray bursts.

But I most want to point out that any 'interactions' by NBHs with ANYTHING ELSE is ALSO via ITS CLOSER-IN and STEEPER GRAVITY WELL GRADIENT which is DISPROPORTIONATE in its vicinity, and hence the possibility of GRAVITATIONAL CAPTURE BY the NBH OWN gravity field, of "ordinary" matter/fields which OTHERWISE may not have 'interacted' in the 'ordinary way'.

So even ESCAPE VELOCITY NBHs that are too small and that would not have time to react in the ordinary way, should STILL have a 'comet-like' HALO/TRAIL of 'extreme gravity captured'  "ordinary" particles (whether charged or uncharged).

Much like what we see with BH-and-ORDINARY STAR binary systems where the 'trail' is from the ordinary star to the BH companion.


Naw, the gravity field strength is the same as ordinary matter of the same mass. It only narrows more to an EH due to the relatively small size of the mass. The only matter that can interact with it gravitationally would have to have virtually no relative angular momentum to it.

It wouldn't attract mass gravitationally any better than any other particle of equal mass (virtually not at all).

I wonder what happens though when you poke a tiny hole in a subatomic particle with one of these things (like a bullet through a cloud?)? Would it collapse? Would it heal? Would it just lose energy? Who knows?

QUOTE
A CORRESPONDINGLY SCALED ordinary-matter halo/trail should therefore also accompany even a small/speedy (putative) NBH speeding through massive matter bodies and OUT again because of its unusual GRAVITATION REACTION profile.....


It reacts gravitationally the same as any other similar mass. It might only exhibit a gravitational effect, just about at the EH itself.

QUOTE (->
QUOTE
A CORRESPONDINGLY SCALED ordinary-matter halo/trail should therefore also accompany even a small/speedy (putative) NBH speeding through massive matter bodies and OUT again because of its unusual GRAVITATION REACTION profile.....


It reacts gravitationally the same as any other similar mass. It might only exhibit a gravitational effect, just about at the EH itself.

..which profile is NOT "ordinary" as in "ordinary-with-ordinary" matter-reaction scenarios. So while it MAY BE that NBH may NOT react in the "ordinary" cross-section/speed 'profile' way with matter, it MAY DO SO in other ways; because of the GRAVITATIONAL 'profile' which 'captures' a halo/trail which would be obvious, and would be a perfect 'feeding' system for such NBHs to GROW (and also SLOW) non-linearly I think.


Look, how much gravitational attraction do you think particle masses have?

QUOTE
But most of all, I wish to point out that even a (putative) NBH travelling AT SPEED in the same trajectories with OTHER cosmic ray matter will (RELATIVE TO THAT ORDINARY MATTER) be essentially SLOW/STATIONARY enough to 'feed' to their heart's content.


I disagree. Just how much matter do you think is moving in tandem with a just formed NBH?

QUOTE (->
QUOTE
But most of all, I wish to point out that even a (putative) NBH travelling AT SPEED in the same trajectories with OTHER cosmic ray matter will (RELATIVE TO THAT ORDINARY MATTER) be essentially SLOW/STATIONARY enough to 'feed' to their heart's content.


I disagree. Just how much matter do you think is moving in tandem with a just formed NBH?

So again, if such (putative) NBHs do NOT 'evaporate immediately they are formed, as you fear, they will still have ample opportunities to gravitationaly capture and feed upon ordinary matter EVEN AT HIGH VELOCITY TRAJECTORIES....both on dense 'stationary' matter AND matter travelling in corresponding velocities/trajectories.


Again, I disagree.

QUOTE
All of which again means that our universe shouldn't look as it does because most massive bodies would have become BHs before now.


Massive? How massive are you talking about? Neutron star massive?

QUOTE (->
QUOTE
All of which again means that our universe shouldn't look as it does because most massive bodies would have become BHs before now.


Massive? How massive are you talking about? Neutron star massive?

That's it from me, uba. I hope this input provides some original food for further thought/discussion in this very intellectually-stimulating thread.


Interesting thoughts, but I think you are thinking that blackholes have more gravity than an equivalent amount of regular matter - that somehow their field size is unusually large and strong. This is not the case. It's just tightly focused at the center.

QUOTE
I'll surf back through in a few days to see what the effects were. Cheers!

RC.
.


Okay, see you later.
ubavontuba
QUOTE (AlphaNumeric+Nov 12 2006, 11:41 PM)
^ What exactly would a sulphur proton be? And what has it got to do with gold?

You're now vearing away from science (not that Homosapiens@Risk was ever close to it) and into conjecture and conspirary theories. Maybe they found aliens on Mars and are negotiating with them to get mind control technology to enslave us all!!  rolleyes.gif

ohmy.gif No, no, no! Haven't you heard? They found an Egyptian pyramid on Mars!

http://forum.physorg.com/index.php?showtopic=1144&hl=

That and the face of course! I think they're looking for the stargate now (any SG-1 fans out there?). laugh.gif
dboots
Well we all know where your guys tin hats are. You keep them real close
don't you.

How awful someone should actually ask a question that you don't have
a ready answer for.


Come on people, the US isn't doing all that surveying for nothing. They must
of found something useful to add to their endless non-organic matter
of creating new elements in the lab with radioactive properties.

Sulfur has some pretty damaging effects especially in dust form.
Lawrence Livermore Lab isn't trying to build a bio lab to test E. COLLI and
Asian flu just because they got nothing better to do. Programs like that
always have a hidden agenda.
Maybe it wasn't sulfur, maybe they found another element to bond with
to use in all their new technology. They didn't coin the phase
"Programmable Matter" just because the words felt so good rolling off their lips.
Give me a break guys. I might not be a physic major, but it don't take a brain
to imagine the possibilities of what Mars might hold that is endearing NASA
to so much exploration.
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