Precise dark matter relic abundance in decoupled sectors
High Energy Physics - Phenomenology
2021-05-19 v2 Cosmology and Nongalactic Astrophysics
Abstract
Dark matter (DM) as a thermal relic of the primordial plasma is increasingly pressured by direct and indirect searches, while the same production mechanism in a decoupled sector is much less constrained. We extend the standard treatment of the freeze-out process to such scenarios and perform precision calculations of the annihilation cross-section required to match the observed DM abundance. We demonstrate that the difference to the canonical value of this 'thermal cross-section' is generally sizeable, and can reach orders of magnitude. Our results directly impact the interpretation of DM searches in hidden sector scenarios.
Cite
@article{arxiv.2007.03696,
title = {Precise dark matter relic abundance in decoupled sectors},
author = {Torsten Bringmann and Paul Frederik Depta and Marco Hufnagel and Kai Schmidt-Hoberg},
journal= {arXiv preprint arXiv:2007.03696},
year = {2021}
}
Comments
9 pages, 4 figures; v2: discussion extended, matches published version