Prospects for indirect detection of frozen-in dark matter

  title={Prospects for indirect detection of frozen-in dark matter},
  author={Matti Heikinheimo and Tommi Tenkanen and Kimmo Tuominen},
  journal={Physical Review D},
We study observational consequences arising from dark matter (DM) of non-thermal origin, produced by dark freeze-out from a hidden sector heat bath. We assume this heat bath was populated by feebly-coupled mediator particles, produced via a Higgs portal interaction with the Standard Model (SM). The dark sector then attained internal equilibrium with a characteristic temperature different from the SM photon temperature. We find that even if the coupling between the DM and the SM sectors is very… 

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