# Two component dark matter with inert Higgs doublet: neutrino mass, high scale validity and collider searches

## TL;DR

This paper explores a two-component dark matter model with an inert Higgs doublet and scalar singlet, examining constraints from high scale stability, neutrino mass, and collider searches, and highlighting the role of DM interactions.

## Contribution

It introduces a novel two-component dark matter model stabilized by symmetries, analyzing its high scale validity, neutrino mass generation, and collider signatures.

## Key findings

- DM-DM interactions expand allowed parameter space
- High scale validity constrains inert doublet mass splitting
- Model predicts distinctive LHC leptonic signatures

## Abstract

The idea of this work is to investigate the constraints on the dark matter (DM) allowed parameter space from high scale validity (absolute stability of Higgs vacuum and perturbativity) in presence of multi particle dark sector and heavy right handed neutrinos to address correct neutrino mass. We illustrate a simple two component DM model, consisting of one inert $SU(2)_L$ scalar doublet and a scalar singlet, both stabilised by additional $\mathcal{Z}_2 \times \mathcal{Z}^{'}_2$ symmetry, which also aid to vacuum stability. We demonstrate DM-DM interaction helps achieving a large allowed parameter space for both the DM components by evading direct search bound. High scale validity puts further constraints on the model, for example, on the mass splitting between the charged and neutral component of inert doublet, which has important implication to its leptonic signature(s) at the Large Hadron Collider (LHC).