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High Energy Physics - Phenomenology, hep-ph
Abstract:
A possible feature of the Inert Doublet Model (IDM) is to provide a dark
matter candidate together with an alteration of both direct and indirect
collider constraints that allow for a heavy Higgs boson. We study the IDM in
light of recent results from Higgs searches at the Large Hadron Collider (LHC)
in combination with dark matter direct-detection limits from the XENON
experiment. We ask under what conditions the IDM can still accommodate a heavy
Higgs boson. We find that IDM scenarios with a Higgs boson in the mass range
160 to 600 GeV are ruled out only when all experimental constraints are
combined. For models explaining only a fraction of the DM the limits are
weakened, and IDMs with a heavy Higgs are allowed. We discuss the prospects for
future detection of such IDM scenarios in the four-lepton plus missing energy
channel at the LHC. This signal can show up in the first year of running at
\sqrt{s} = 14 TeV, and we present detector-level studies for a few benchmark
models.
