Precise dark matter relic abundance in decoupled sectors

Bringmann, Torsten; Hufnagel, Marco; Schmidt-Hoberg, Kai; Depta, Paul Frederik

doi:10.1016/j.physletb.2021.136341

Journal Article

PUBDB-2022-00219

Precise dark matter relic abundance in decoupled sectors

Bringmann, T. ; Depta, P. F. (Corresponding author)DESY* ; Hufnagel, M.Extern* ; Schmidt-Hoberg, K.DESY*

2021
North-Holland Publ. Amsterdam

Physics letters / B 817, 136341 (2021) [10.1016/j.physletb.2021.136341]

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Please use a persistent id in citations: doi:10.1016/j.physletb.2021.136341 doi:10.3204/PUBDB-2022-00219

Report No.: DESY-20-113; arXiv:2007.03696

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.

Keyword(s): dark matter: relic density ; cross section: annihilation ; decoupling ; hidden sector ; freeze-out ; thermal ; plasma ; Dark matter ; Hidden sectors ; Thermal freeze-out

Classification:

ddc:530

Note: Phys. Lett. B 817, 136341 (2021). 9 pages, 4 figures; v2: discussion extended, matches published version

Contributing Institute(s):

Theorie-Gruppe (T)

Research Program(s):

Experiment(s):

No specific instrument

Appears in the scientific report 2021

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