Compressing the inert doublet model

Abstract

The Inert Doublet Model relies on a discrete symmetry to prevent couplings of the new scalars to Standard Model fermions. This stabilizes the lightest inert state, which can then contribute to the observed dark matter density. In the presence of additional approximate symmetries, the resulting spectrum of exotic scalars can be compressed. Here, we study the phenomenological and cosmological implications of this scenario. We derive new limits on the compressed Inert Doublet Model from LEP, and outline the prospects for exclusion and discovery of this model at dark matter experiments, the LHC, and future colliders.

Radiative- Z2 -breaking twin Higgs model

“…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. [18]. And if we assume the dark matter candidate is the particle in the twin sector, the inert scalars could be as light as 100 GeV with degenerate masses.…”

Constraining the Inert Doublet Model using Vector Boson Fusion

“…After the discovery of a SM-like Higgs particle in 2012, many studies have been performed in the context of the IDM which use Higgs measurements as well as astrophysical observations, see e.g. [14][15][16][17][18][19][20][21][22][23]. 1 In addition, proposals were made how to search for dark scalars at the LHC in leptonic final states [15,22,[28][29][30][31] and in single or dijet channels [32,33].…”

IDM and not only

“…in two lepton + MET channel [5,6]. Other collider studies and scans of the models parameter space have been presented in [7,8,9,10,11,12,13,14,15,16,17]. Moreover the model offers rich cosmological phenomenology.…”