In scenarios with very small dark matter (DM) couplings and small mass splittings between the DM and other dark sector particles, so-called "co-scattering" or "conversion-driven freeze-out" can be the dominant mechanism for DM production. We present the inclusion of this mechanism in micrOMEGAs together with a case study of the phenomenological implications in the fermionic singlet-triplet model. For the latter, we focus on the transition between co-annihilation and co-scattering processes. We observe that co-scattering is needed to describe the thermal behaviour of the DM for very small couplings, opening up a new region in the parameter space of the model. The triplet states are often long-lived in this region; we therefore also discuss LHC constraints from long-lived signatures obtained with SModelS.
Cited by 2
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 2 Gaël Alguero,
- 2 Geneviève Bélanger,
- 1 Sabine Kraml,
- 3 Alexander Pukhov
- 1 Université Grenoble Alpes / Grenoble Alpes University [UGA]
- 2 Laboratoire d'Annecy-le-Vieux de Physique Théorique [LAPTh]
- 3 Skobeltsyn Institute of Nuclear Physics [SINP MSU]