An updated analysis of Inert Higgs Doublet Model in light of the recent results from LUX, PLANCK, AMS-02 and LHC

Abstract

In light of the recent discovery by the ATLAS and CMS experiments at the Large Hadron Collider (LHC) of a Higgs-like particle with a narrow mass range of 125–126 GeV, we perform an updated analysis on one of the popular scalar dark matter models, the Inert Higgs Doublet Model (IHDM). We take into account in our likelihood analysis of various experimental constraints, including recent relic density measurement, dark matter direct and indirect detection constraints as well as the latest collider constraints on the invisible decay width of the Higgs boson and monojet search at the LHC. It is shown that if the invisible decay of the standard model Higgs boson is open, LHC as well as direct detection experiments like LUX and XENON100 could put stringent limits on the Higgs boson couplings to dark matter. We find that the most favoured parameter space for IHDM corresponds to dark matter with a mass less than 100 GeV or so. In particular, the best-fit points are at the dark matter mass around 70 GeV where the invisible Higgs decay to dark matter is closed. Scalar dark matter in the higher mass range of 0.5–4 TeV is also explored in our study. Projected sensitivities for the future experiments of monojet at LHC-14, XENON1T and AMS-02 one year antiproton flux are shown to put further constraints on the existing parameter space of IHDM.

Observable heavy Higgs dark matter

“…As of now, there are two regions of DM masses where one can expect viable solutions: a low DM mass region, 53 GeV m DM m W and a heavy DM mass region, m DM 525 GeV. The most recent experimental data, both from direct detection experiments and from the LHC, has reduced the viable parameter space in the low mass region [12,13]. In the heavy mass region, however, where the sensitivity of DM direct detection experiments decreases significantly with increasing DM mass, the DM candidate may escape possible detection in this model.…”

Dark matter with two inert doublets plus one Higgs doublet

“…The I(1+1)HDM parameter space is strongly constrained by the recent LHC and direct detection results which lead to exclusion of the low DM mass region for m DM 55 GeV [54][55][56]. This is due to the incompatibility between the relic density limits, which require the Higgs-DM coupling to be relatively big to ensure the efficient-enough DM annihilation, and the LHC µ γγ and Br(h → inv.)…”

The inert Zee model

“…Note that the requirement of having small Yukawacouplings is also in agreement with neutrino masses and µ → eγ as it will be shown below. It follows that the viable DM mass range for this scenario (the same of the one in the IDM) is composed by two regions [27,28,33,[36][37][38][39]…”