%0 Journal Article
%A Bringmann, Torsten
%A Depta, Paul Frederik
%A Hufnagel, Marco
%A Schmidt-Hoberg, Kai
%T Precise dark matter relic abundance in decoupled sectors
%J Physics letters / B
%V 817
%N arXiv:2007.03696
%@ 0370-2693
%C Amsterdam
%I North-Holland Publ.
%M PUBDB-2022-00219
%M arXiv:2007.03696
%M DESY-20-113
%P 136341
%D 2021
%Z Phys. Lett. B 817, 136341 (2021). 9 pages, 4 figures; v2: discussion extended, matches published version
%X 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.
%K dark matter: relic density (INSPIRE)
%K cross section: annihilation (INSPIRE)
%K decoupling (INSPIRE)
%K hidden sector (INSPIRE)
%K freeze-out (INSPIRE)
%K thermal (INSPIRE)
%K plasma (INSPIRE)
%K Dark matter (autogen)
%K Hidden sectors (autogen)
%K Thermal freeze-out (autogen)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000657652200033
%R 10.1016/j.physletb.2021.136341
%U https://bib-pubdb1.desy.de/record/473739