TY  - JOUR
AU  - Bringmann, Torsten
AU  - Depta, Paul Frederik
AU  - Hufnagel, Marco
AU  - Schmidt-Hoberg, Kai
TI  - Precise dark matter relic abundance in decoupled sectors
JO  - Physics letters / B
VL  - 817
IS  - arXiv:2007.03696
SN  - 0370-2693
CY  - Amsterdam
PB  - North-Holland Publ.
M1  - PUBDB-2022-00219
M1  - arXiv:2007.03696
M1  - DESY-20-113
SP  - 136341
PY  - 2021
N1  - Phys. Lett. B 817, 136341 (2021). 9 pages, 4 figures; v2: discussion extended, matches published version
AB  - 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.
KW  - dark matter: relic density (INSPIRE)
KW  - cross section: annihilation (INSPIRE)
KW  - decoupling (INSPIRE)
KW  - hidden sector (INSPIRE)
KW  - freeze-out (INSPIRE)
KW  - thermal (INSPIRE)
KW  - plasma (INSPIRE)
KW  - Dark matter (autogen)
KW  - Hidden sectors (autogen)
KW  - Thermal freeze-out (autogen)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000657652200033
DO  - DOI:10.1016/j.physletb.2021.136341
UR  - https://bib-pubdb1.desy.de/record/473739
ER  -