Abstract: We propose a new framework for explaining the proximity of the baryon and dark matter relic densities ΩDM ≈ 5ΩB. The scenario assumes that the number density of the observed dark matter states is generated due to decays from a second hidden sec-tor 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. Moreover, we argue that this scenario circumvents several of the experimental bounds which significantly constrain typical models of asymmetric dark matter. We present a simple supersymmetric implementation of thi...
