QCD Axion Dark Matter with a Small Decay Constant
High Energy Physics - Phenomenology
2018-07-27 v2 Cosmology and Nongalactic Astrophysics
Abstract
The QCD axion is a good dark matter candidate. The observed dark matter abundance can arise from misalignment or defect mechanisms, which generically require an axion decay constant GeV (or higher). We introduce a new cosmological origin for axion dark matter, parametric resonance from oscillations of the Peccei-Quinn symmetry breaking field, that requires GeV. The axions may be warm enough to give deviations from cold dark matter in Large Scale Structure.
Cite
@article{arxiv.1711.10486,
title = {QCD Axion Dark Matter with a Small Decay Constant},
author = {Raymond T. Co and Lawrence J. Hall and Keisuke Harigaya},
journal= {arXiv preprint arXiv:1711.10486},
year = {2018}
}
Comments
6 pages, 2 figures; v2: discussions and references added