Axion cold dark matter in non-standard cosmologies

Details Axion cold dark matter in non-standard cosmologies Axion cold dark matter in non-standard cosmologies

2009-11-30

arxiv.org/abs/0912.0015v1

Phys.Rev.D81:063508,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

38 pages, 6 figures

Scientific paper

10.1103/PhysRevD.81.063508

We study the parameter space of cold dark matter axions in two cosmological scenarios with non-standard thermal histories before Big Bang nucleosynthesis: the Low Temperature Reheating (LTR) cosmology and the kination cosmology. If the Peccei-Quinn symmetry breaks during inflation, we find more allowed parameter space in the LTR cosmology than in the standard cosmology and less in the kination cosmology. On the contrary, if the Peccei-Quinn symmetry breaks after inflation, the Peccei-Quinn scale is orders of magnitude higher than standard in the LTR cosmology and lower in the kination cosmology. We show that the axion velocity dispersion may be used to distinguish some of these non-standard cosmologies. Thus, axion cold dark matter may be a good probe of the history of the Universe before Big Bang nucleosynthesis.

Affiliated with

Also associated with

No associations

Rating

Axion cold dark matter in non-standard cosmologies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Axion cold dark matter in non-standard cosmologies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Axion cold dark matter in non-standard cosmologies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-444365