Inert doublet model in light of LHC Run I and astrophysical data

Abstract

We discuss the parameter space of the Inert Doublet Model, a two Higgs doublet model with a dark matter candidate. An extensive set of theoretical and experimental constraints on this model is considered, where both collider as well as astroparticle data limits, the latter in the form of dark matter relic density as well as direct detection, are taken into account. We discuss the effects of these constraints on the parameter space of the model. In particular, we do not require the IDM to provide the full dark matter content of the universe, which opens up additional regions in the parameter space accessible at collider experiments. The combination of all constraints leads to a relatively strong mass degeneracy in the dark scalar sector for masses 200 GeV, and to a minimal scale ∼ 45 GeV for the dark scalar masses. We also observe a stringent mass hierarchy M ± H > M A . We propose benchmark points and benchmark planes for dark scalar pair-production for the current LHC run being in compliance with all theoretical as well as experimental bounds.

The waning of the WIMP? A review of models, searches, and constraints

“…We will first review the Inert Doublet Model (IDM) [327][328][329][330][331][332][333][334][335] in which the DM belongs to a scalar SU (2) doublet coupled with the SM Higgs sector. For what concerns the case of mixing between SU (2) singlets and multiplet we will consider the simplest possibility, the so called Singlet-Doublet models [173], specializing to the cases of Dirac [177] and Majorana [176,[336][337][338] fermionic DM.…”

Radiative- Z2 -breaking twin Higgs model

“…Furthermore, assuming the neutral inert scalar boson being candidate of dark matter, the current data of direct detection constrain the mass of dark matter candidate to be greater than 600 GeV [17]. On the other hand, if masses of inert Higgses are nearly degenerate, it is very difficult to probe the compressed parameter region at current LHC, which has been studied in Ref.…”

Prospects for charged Higgs searches at the LHC

“…Collider as well as astroparticle data limits were included, the latter in the form of dark matter relic density as well as direct detection data. A minimal scale of 45 GeV for the dark scalar mass, and a stringent mass hierarchy M S ± > M A are found [273]. Parameter points and planes for dark scalar pair production S + S − for the current LHC run are proposed, with S + masses in the range 120-450 GeV [273].…”

“…In the latter case, its mass is very close to that of the DM particle. On the other hand, if the model is not required to saturate the DM relic abundance, only not to produce too much DM, then the charged-scalar mass is less constrained [273].…”

“…Analyses based on an extensive set of theoretical and experimental constraints on this model have recently been performed, both at tree level [273,274] and at loop level [26]. Collider as well as astroparticle data limits were included, the latter in the form of dark matter relic density as well as direct detection data.…”