Baryonic and Leptonic GeV Dark Matter

TL;DR

This paper systematically analyzes GeV-scale dark matter models coupled to baryons and leptons, highlighting viable baryonic models free from proton decay and exploring leptonic models for baryogenesis and indirect detection signals.

Contribution

It identifies viable baryonic dark matter models without proton decay and provides a detailed study of leptonic dark matter models related to leptogenesis and detection signals.

Findings

Few baryonic models are free from proton decay

Leptonic models can generate baryon asymmetry via leptogenesis

Predicted dark matter signals in indirect detection experiments

Abstract

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. We enumerate those cases and provide 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.