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

Authors
  • Giacchino, Federica
  • Ibarra, Alejandro
  • Honorez, Laura Lopez
  • Tytgat, Michel H. G.
  • Wild, Sebastian
Type
Preprint
Publication Date
Feb 02, 2016
Submission Date
Nov 13, 2015
Identifiers
DOI: 10.1088/1475-7516/2016/02/002
Source
arXiv
License
Yellow
External links

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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