Axions, Time Varying CP Violation, and Baryogenesis
High Energy Physics - Phenomenology
2022-01-10 v2 Cosmology and Nongalactic Astrophysics
Abstract
We derive two features of axion cosmology that may have cosmological implications, whether or not axions are dark matter: For the full range of allowed axion masses, the evolution of a cosmic axion background allows large CP violation until temperatures as low as 2 GeV, and once the axion field begins to oscillate, the cosmological axion field's relaxation to its ground state can briefly provide a new departure from thermal equilibrium, via time-varying CP violation. During both of these periods, the Strong CP violating parameter can be as large as O(1).
Cite
@article{arxiv.2201.01447,
title = {Axions, Time Varying CP Violation, and Baryogenesis},
author = {Lawrence M. Krauss},
journal= {arXiv preprint arXiv:2201.01447},
year = {2022}
}
Comments
3 pages, submitted to Phys. Rev.D, also references corrected