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- W2014689492 abstract "We study the parameter space of cold dark matter axions in two cosmological scenarios with nonstandard 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 nonstandard cosmologies. Thus, axion cold dark matter may be a good probe of the history of the Universe before big bang nucleosynthesis." @default.
- W2014689492 created "2016-06-24" @default.
- W2014689492 creator A5009682080 @default.
- W2014689492 creator A5070155350 @default.
- W2014689492 date "2010-03-08" @default.
- W2014689492 modified "2023-09-29" @default.
- W2014689492 title "Axion cold dark matter in nonstandard cosmologies" @default.
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