Mono-Higgs detection of dark matter at the LHC

Abstract

Motivated by the recent discovery of the Higgs boson, we investigate the possibility that a missing energy plus Higgs final state is the dominant signal channel for dark matter at the LHC. We consider examples of higher-dimension operators where a Higgs and dark matter pair are produced through an off-shell Z or γ, finding potential sensitivity at the LHC to cutoff scales of around a few hundred GeV. We generalize this production mechanism to a simplified model by introducing a Z′ as well as a second Higgs doublet, where the pseudoscalar couples to dark matter. Resonant production of the Z′ which decays to a Higgs plus invisible particles gives rise to a potential mono-Higgs signal. This may be observable at the 14 TeV LHC at low tan β and when the Z′ mass is roughly in the range 600 GeV to 1.3 TeV. © 2014 The Author(s).