QUOTE (Confused1+May 13 2012, 10:06 AM)
Is the < 2.2eV rest or relativistic mass? What is the energy of the particle (if not < 2.2eV)? (We are preparing to have guests for dinner).
C2, everything's still insanely fuzzy
.... foggedly inapparent, with lashings of flavour changing, Majorana mechanism, mass eigenstates having values all over the shop. Essentially, more ludicrous than a long range UK weather forecast.
Edit;- help!
mathman
13th May 2012 - 08:34 PM
The neutrinos from a supernova have an almost clear path out, so their time of flight is not affected. Radiation has to go through a lot of matter, so it is impeded by reaction with the matter.
An everyday analogy: Neutrinos from the sun arrive at the earth a few minutes after they are born in the fusion reaction. On the other hand, radiation from fusion takes years to finally reach the surface and get out.
(Note - I am a little hazy as to the times involved, but the general idea is valid.)
Lady Elizabeth
13th May 2012 - 08:53 PM
QUOTE (mathman+May 13 2012, 08:34 PM)
The neutrinos from a supernova have an almost clear path out, so their time of flight is not affected. Radiation has to go through a lot of matter, so it is impeded by reaction with the matter.
An everyday analogy: Neutrinos from the sun arrive at the earth a few minutes after they are born in the fusion reaction. On the other hand, radiation from fusion takes years to finally reach the surface and get out.
(Note - I am a little hazy as to the times involved, but the general idea is valid.)
Yeah, I've already taken this into consideration; however, this absorption, re-emission jazz would only act to delay the initial photon burst for tens of hours @ most .... if neutrinos had any semblence of mass they'd arrive much, much later ... that's why I'm beginning to doubt this oscillation flavour concept stuff.
Lady Elizabeth
13th May 2012 - 09:02 PM
Extract from
wiki"The neutrino measurements allowed upper bounds on neutrino mass and charge, as well as the number of flavors of neutrinos and other properties.[6] For example, the data show that within 5% confidence, the rest mass of the electron neutrino is at most 16 eV. The data suggests that the total number of neutrino flavors is at most 8 but other observations and experiments give tighter estimates"
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