Axions, Time Varying CP Violation, and Baryogenesis
@inproceedings{Krauss2022AxionsTV,
title={Axions, Time Varying CP Violation, and Baryogenesis},
author={Lawrence Krauss},
year={2022}
}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…
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