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We explore the Large Hadron Collider (LHC) phenomenology of dark matter (DM) pair production in association with a 125-GeV Higgs boson. This signature, dubbed ``mono-Higgs,'' appears as a single Higgs boson plus missing energy from DM particles escaping the detector. We perform an LHC background study for mono-Higgs signals at √s=8 and 14 TeV for four Higgs boson decay channels: γγ, bb̄, ZZ*→4, and jj. We estimate the LHC sensitivities to a variety of new physics scenarios within the frameworks of both effective operators and simplified models. For all of these scenarios, the γγ channel provides the best sensitivity, whereas the bb̄ channel suffers from a large tt̄ background. Mono-Higgs is unlike other mono-X searches (X=jet, photon, etc.) since the Higgs boson is unlikely to be radiated as initial state radiation and therefore probes the underlying DM vertex directly.
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Carpenter et al. (2014) studied this question.
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