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Article Dans Une Revue SciPost Physics Année : 2022

Co-scattering in micrOMEGAs: a case study for the singlet-triplet dark matter model

Résumé

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.

Dates et versions

hal-03772805 , version 1 (08-09-2022)

Identifiants

Citer

Gael Alguero, Genevieve Belanger, Sabine Kraml, Alexander Pukhov. Co-scattering in micrOMEGAs: a case study for the singlet-triplet dark matter model. SciPost Physics, 2022, 13 (6), pp.124. ⟨10.21468/SciPostPhys.13.6.124⟩. ⟨hal-03772805⟩
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