Dark-matter spontaneous freeze out
High Energy Physics - Phenomenology
2020-03-30 v1 High Energy Astrophysical Phenomena
High Energy Physics - Theory
Abstract
We consider the possibility that thermalized dark-matter particles acquire their mass thanks to the spontaneous breaking of a symmetry below some critical temperature. We describe the regime where a freeze out mechanism takes place shortly after the onset of the phase transition, while the dark-matter mass has not yet reached its final constant value. For such a "spontaneous freeze out" to yield the correct relic density, the present-time cross section of annihilation of the dark matter into Standard-Model states has to be one or two orders of magnitude larger than in the case of a constant dark-matter mass.
Cite
@article{arxiv.2003.12329,
title = {Dark-matter spontaneous freeze out},
author = {Hervé Partouche},
journal= {arXiv preprint arXiv:2003.12329},
year = {2020}
}
Comments
Based on a talk given at the International Conference on Neutrinos and Dark Matter (NDM-2020), 11-14 January 2020, Hurghada, Egypt