Cosmological constraints on thermal relic axions and axion-like particles

Details Cosmological constraints on thermal relic axions and axion-like particles Cosmological constraints on thermal relic axions and axion-like particles

2011-10-26

arxiv.org/abs/1110.5837v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 4 figures. To appear in the proceedings of 7th Patras Workshop on Axions, WIMPs and WISPs, Mykonos, Greece, 26 June -

Scientific paper

Cosmological precision data can be used to set very strict constraints on
Axions and Axion-like particles (ALPs) produced thermally in the big bang. We
briefly review the known bounds and propose two new constraints for Axions and
ALPs decaying in the early universe, based upon the concomitant dilution of
baryon and neutrino densities, using WMAP7 and other cosmological data.

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