Baryonic and leptonic GeV dark matter

We perform a systematic analysis of models with GeV-scale dark matter coupled to baryons and leptons. Such theories provide a natural framework to explain the matter-antimatter asymmetry of the universe. We find that only a few baryonic dark matter models are free from tree-level proton decay without explicitly imposing baryon number conservation, provided that the dark matter particle is sufficiently heavy. We enumerate those cases and present a brief overview of their phenomenology. We then focus on a leptonic dark matter model for a more detailed discussion of the baryon asymmetry generation via leptogenesis, the symmetry restoration in the dark sector and the expected dark matter annihilation signals in indirect detection experiments. (c) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Automated summary

The study systematically analyzes models with GeV-scale dark matter coupled to baryons and leptons, focusing on baryonic dark matter models that are free from tree-level proton decay when the dark matter particle is sufficiently heavy. A detailed discussion is then presented on a leptonic dark matter model, covering baryon asymmetry generation via leptogenesis, symmetry restoration in the dark sector, and expected dark matter annihilation signals in indirect detection experiments.