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Probing Higgs-portal dark matter with vector-boson fusion

Jan Heisig, Michael Krämer, Eric Madge, Alexander Mück
2020 Journal of High Energy Physics  

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We constrain the Higgs-portal model employing the vector-boson fusion channel at the LHC. In particular, we include the phenomenologically interesting parameter region near the Higgs resonance, where the Higgs-boson mass is close to the threshold for dark-matter production and a running-width prescription has to be employed for the Higgsboson propagator. Limits for the Higgs-portal coupling as a function of the dark-matter mass are derived from the CMS search for invisible Higgs-boson decays in
more » ... vector-boson fusion at 13 TeV. Furthermore, we perform projections for the 14 TeV HL-LHC and the 27 TeV HE-LHC taking into account a realistic estimate of the systematic uncertainties. The respective upper limits on the invisible branching ratio of the Higgs boson reach a level of 2% and constrain perturbative Higgs-portal couplings up to dark-matter masses of about 110 GeV.
doi:10.1007/jhep03(2020)183 fatcat:ijzjuzqx4zhkpl5n2ua7iuxkdq
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Jan Heisig, Michael Krämer, Eric Madge, Alexander Mück. "Probing Higgs-portal dark matter with vector-boson fusion." Journal of High Energy Physics 2020.3 (2020)