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arXiv · 1212.1425

Exodus: Hidden origin of dark matter and baryons

James Unwin
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Abstract

We propose a new framework for explaining the proximity of the baryon and dark matter relic densities \Omega_{DM} \approx 5\Omega_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.

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James Unwin. 2012-12-06. Exodus: Hidden origin of dark matter and baryons. https://doi.org/10.1007/jhep06(2013)090

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