As we know, galaxies cannot form, based according to current observations of projected star densities. However, many years ago a couple of "bright sparks"solved this problem with the introduction of Dark Matter (what??), mindsplatteringly followed much later, by other "scientists" in an equally, on par stunning display of intellect giving us....Dark Energy.
The upshot of these preposterous theories, is that now teams of researchers, reside deep beneath the earth, with kilometres of cosmic ray shielding rock above their heads, hoping to capture a non-existant neutrino interaction....is this the true definition of "refined insanity"..or what?...The same goes for all those costly particle accelerators...What do these guy's take us for?.....I've good reason to believe these absurd activities act as a monumental smokescreen to perpetuate an insidious "gravy train".
This aside, using common sense rationale; our universe could "more reasonably" be held together by a natural "fortification" of time-space...This 96% extra gravitational energy simply emanates from non-intersectional (of our brane continuum) hypertoroids, and impart energy into our brane via timespace (hybrid, trans-dimensional linkage space). These "outer" vacuolar wave envelopes possibly exist as particles in other brane continuums, and are in part, responsible for our cosmological expansion, as this gravitational force is sourced in exterior space. Therefore, an accelerative force acting outwardly (in all directions at once!) is created. More importantly it substantially raises the overall time-space gravity density allowing for me to type this sh!t.
...and for the aforementioned galaxies to arise. 
It depends mostly to the energy of collision, what part of internal particle structure will remain a what part will be created from scratch. Don't forget, even the nearly zero initial energy collisions can exist at the case of uncharged particles interactions, in particular. After all, the collision experiments are the only way, how to determine the mass, momentum and some other insintric constants at the case of such particles.
