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arXiv · 1511.04452

Signatures from Scalar Dark Matter with a Vector-like Quark Mediator

Federica Giacchino·Alejandro Ibarra·Laura Lopez Honorez·Michel H. G. Tytgat·Sebastian Wild
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Abstract

We present a comprehensive study of a model where the dark matter is composed of a singlet real scalar that couples to the Standard Model predominantly via a Yukawa interaction with a light quark and a colored vector-like fermion. A distinctive feature of this scenario is that thermal freeze-out in the early universe may be driven by annihilation both into gluon pairs at one-loop ($gg$) and by virtual internal Bremsstrahlung of a gluon ($q \bar{q} g$). Such a dark matter candidate may also be tested through direct and indirect detection and at the LHC; viable candidates have either a mass nearly degenerate with that of the fermionic mediator or a mass above about 2 TeV.

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Federica Giacchino, Alejandro Ibarra, Laura Lopez Honorez, Michel H. G. Tytgat, Sebastian Wild. 2016-02-02. Signatures from Scalar Dark Matter with a Vector-like Quark Mediator. https://doi.org/10.1088/1475-7516%2F2016%2F02%2F002

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