Simple Fermionic Dark Matter Models and Higgs Boson Couplings

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dc.rights.license Attribution 4.0 International (CC BY 4.0) en_US
dc.contributor.author Okada, Nobuchika
dc.date.accessioned 2019-06-06T17:00:32Z
dc.date.available 2019-06-06T17:00:32Z
dc.date.copyright 2013
dc.date.issued 2013-10
dc.identifier.citation Okada, N., Yamada, T. (2013): Simple Fermionic Dark Matter Models and Higgs Boson Couplings, Journal of High Energy Physics. DOI: http://dx.doi.org/10.1007/JHEP10(2013)017 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/5686
dc.description.abstract We consider a simple extension of the Standard Model (SM) that incorporates a Majorana fermion dark matter and a charged scalar particle with a coupling to the SM leptons through renormalizable terms. Another renormalizable term involving the charged scalar and the Higgs boson gives rise to interactions between the dark matter and SM quarks at the one-loop level, which induce the elastic scatterings between dark matter and nucleus. The same term also affects the effective coupling of the Higgs boson to diphoton through a one-loop diagram with the charged scalar. Therefore, our model predicts a correlation between the spin-independent cross section for dark matter-nucleus elastic scatterings and a new contribution to the effective Higgs boson coupling to diphoton. When the spin-dependent cross section is large enough to be tested in future direct dark matter detection experiments, the Higgs-diphoton decay rate shows a sizable deviation from the SM prediction. We also consider the case where the fermion dark matter is a Dirac particle. Most of discussions is similar to the Majorana case, but we find that the magnetic dipole moment of the Dirac fermion dark matter is loop-induced and this interaction dominates the spin-independent cross section for dark matter-nucleus elastic scatterings. We find that the resultant cross section is about an order of magnitude below the current experimental bound and hence can be tested in the near future. en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.publisher Published for SISSA by Springer en_US
dc.rights.uri https://creativecommons.org/licenses/by/4.0/ en_US
dc.subject Higgs Physics en_US
dc.subject Cosmology of Theories beyond the SM en_US
dc.title Simple Fermionic Dark Matter Models and Higgs Boson Couplings en_US
dc.type text en_US


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