Publication: Nonstandard Yukawa couplings and Higgs portal dark matter
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Issued Date
2016
Resource Type
File Type
application/pdf
ISSN
11266708
Other identifier(s)
2-s2.0-84953375758
Rights Holder(s)
Scopus
Bibliographic Citation
Journal of High Energy Physics. Vol 2016, No.1 (2016), p.1-34
Suggested Citation
Bishara F., Brod J., Uttarayat P., Zupan J. Nonstandard Yukawa couplings and Higgs portal dark matter. Journal of High Energy Physics. Vol 2016, No.1 (2016), p.1-34. doi:10.1007/JHEP01(2016)010 Retrieved from: https://hdl.handle.net/20.500.14740/5983
Author(s)
Abstract
We study the implications of non-standard Higgs Yukawa couplings to light quarks on Higgs-portal dark matter phenomenology. Saturating the present experimental bounds on up-quark, down-quark, or strange-quark Yukawa couplings, the predicted direct dark matter detection scattering rate can increase by up to four orders of magnitude. The effect on the dark matter annihilation cross-section, on the other hand, is subleading unless the dark matter is very light — a scenario that is already excluded by measurements of the Higgs invisible decay width. We investigate the expected size of corrections in multi-Higgs-doublet models with natural flavor conservation, the type-II two-Higgs-doublet model, the Giudice-Lebedev model of light quark masses, minimal flavor violation new physics models, Randall-Sundrum, and composite Higgs models. We find that an enhancement in the dark matter scattering rate of an order of magnitude is possible. Finally, we point out that a discovery of Higgs-portal dark matter could lead to interesting bounds on the light-quark Yukawa couplings. © 2016, The Author(s).