Fermion portal dark matter

Author:

Bai Yang,Berger Joshua

Abstract

Abstract We study a class of simplified dark matter models in which one dark matter particle couples with a mediator and a Standard Model fermion. In such models, collider and direct detection searches probe complimentary regions of parameter space. For Majorana dark matter, direct detection covers the region near mediator-dark matter degeneracy, while colliders probe regions with a large dark matter and mediator mass splitting. For Dirac and complex dark matter, direct detection is effective for the entire region above the mass threshold, but colliders provide a strong bound for dark matter lighter than a few GeV. We also point out that dedicated searches for signatures with two jets or a monojet not coming from initial state radiation, along missing transverse energy can cover the remaining parameter space for thermal relic dark matter.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

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