Exodus: Hidden origin of dark matter and baryons

Abstract

We propose a new framework for explaining the proximity of the baryon and dark matter relic densities Ω_{DM} \approx 5Ω_B. The scenario assumes that the number density of the observed dark matter states is generated due to decays from a second hidden sector which simultaneously generates the baryon asymmetry. In contrast to asymmetric dark matter models, the dark matter can be a real scalar or Majorana fermion and thus presents distinct phenomenology. We discuss aspects of model building and general constraints in this framework. We present a simple supersymmetric implementation of this mechanism and show that it can be used to obtain the correct dark matter relic density for a bino LSP.

20 pages. v2: Appendix added, published version

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Cited by in corpus (9)

• Bounds on self-interacting fermion dark matter from observations of old neutron stars
• Flooded Dark Matter and S Level Rise
• Annihilation Signals from Asymmetric Dark Matter
• Baryon Asymmetry and Dark Matter Through the Vector-Like Portal
• Isospin violating dark matter being asymmetric
• Towards Cogenesis via Asymmetric Freeze-in: The $\chi$ Who Came-in from the Cold
• Indirect Detection Signatures for the Origin of Asymmetric Dark Matter
• Cogenerating and Pre-annihilating Dark Matter by a New Gauge Interaction in a Unified Model
• Filtered Baryogenesis