The Four Basic Ways of Creating Dark Matter Through a Portal

Details The Four Basic Ways of Creating Dark Matter Through a Portal The Four Basic Ways of Creating Dark Matter Through a Portal

2011-12-02

arxiv.org/abs/1112.0493v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

39 pages, 15 figures

Scientific paper

We consider the possibility that along the thermal history of the Universe, dark matter (DM) would have been created from Standard Model particles, either through a kinetic mixing portal to an extra U(1) gauge field, or through the Higgs portal. Depending solely on the DM particle mass, on the portal and on the DM hidden sector interaction, we show how the observed DM relic density can be obtained. There are four possible freeze-in/reannihilation/freeze-out regimes, which together result in a simple characteristic relic density phase diagram, with the shape of a "Mesa". In the case of the kinetic mixing portal, we show that, unlike other freeze-in scenarios discussed in the literature, the freeze-in regime can be probed by forthcoming DM direct detection experiments. These results are well representative of any scenario where a DM hidden sector would be created out of the Standard Model sector.

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