Higgs $\to \gamma \gamma $, $Z\gamma $ in the Inert Doublet Model

Significant gamma lines from inert Higgs dark matter.

One way to unambiguously confirm the existence of particle dark matter and determine its mass would be to detect its annihilation into monochromatic gamma-rays in upcoming telescopes. One of the most minimal models for dark matter is the inert doublet model, obtained by adding another Higgs doublet with no direct coupling to fermions. For a mass between 40 and 80 GeV, the lightest of the new in...

Low Energy Gamma Ray Excess Confronting a Singlet Scalar Extended Inert Doublet Dark Matter Model

Recent study of gamma rays originating from the region of galactic centre has confirmed an anomalous γ-ray excess within the energy range 1-3 GeV. This can be explained as the consequence of pair annihilation of a 31-40 GeV dark matter into bb̄ with thermal annihilation cross-section σv ∼ 1.4 − 2.0 × 10−26 cm/s. In this work we revisit the Inert Doublet Model (IDM) in order to explain this gamma...

In the Two - Higgs Doublet - Model

Simple Two Higgs Doublet Model

Dark Matter with Topological Defects in the Inert Doublet Model

We examine the production of dark matter by decaying topological defects in the high mass region mDM mW of the Inert Doublet Model, extended with an extra U(1) gauge symmetry. The density of dark matter states (the neutral Higgs states of the inert doublet) is determined by the interplay of the freeze-out mechanism and the additional production of dark matter states from the decays of topologic...