RE: Freezing-in and freezing-out dark matter
Well , I understood that particles were created during the re-ionization phase (just as the Inflation ceased): Some of the potential energy of the inflaton field was converted to particles (Basically quarks and gluons). This is what I mean by quark and gluon genesis.
I was wondering if dark matter could have been created in the same process, or if it would have been the decay of the heaviest quarks + energetic collisions of quarks that could have created it, or a combination of both.
And in the end, if calculations based on the various inflaton field models could predict which of the freeze-out or freeze-in model would be favored (i.e., determining the relative quantity of Dark Matter created vs. normal matter).
Of course, these questions are only valid if we assume the inflationary models to hold some truth...
I guess that this is a very model dependent question and depending on the theory, you could have one or the other. For instance, in freeze-in model, there is no dark matter in the early days and it appears progressively. In freeze-out model, it could (should) be connected to inflation somehow.
Some could probably, I would say. But this is not easy (as one would try to solve many questions simultaneously).