Compressing the Inert Doublet Model

TL;DR

This paper investigates a compressed version of the Inert Doublet Model, analyzing its phenomenological and cosmological implications, deriving new experimental limits, and exploring detection prospects at various collider and dark matter experiments.

Contribution

It introduces a compressed spectrum scenario for the Inert Doublet Model and assesses its experimental and cosmological consequences.

Findings

New limits from LEP on the compressed model

Prospects for detection at dark matter experiments

Potential for exclusion at the LHC and future colliders

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.