New features in the Z2xZ2 3HDM two component DM model

TL;DR

This paper explores a three Higgs doublet model with a Z2×Z2 symmetry, analyzing its vacuum structure, constraints, and dark matter phenomenology, revealing new viable parameter regions with distinctive experimental signatures.

Contribution

It introduces new features and viable parameter space in a 3HDM with two inert doublets, focusing on two-component dark matter and its experimental implications.

Findings

Identified new regions of parameter space with viable two-component dark matter.

Found scenarios where both dark matter particles contribute equally to relic density.

Proposed distinctive experimental signatures for future dark matter searches.

Abstract

We investigate the constraints and phenomenology of a three Higgs doublet model (3HDM) with a $\Z2\times\Z2$ symmetry, featuring two inert scalar doublets that give rise to a two-component dark matter (DM) scenario. We analyze the model's vacuum structure, exploring the competition between different symmetry-breaking minima, and subject it to comprehensive theoretical and current experimental constraints. Our analysis reveals previously unexplored regions of parameter space with viable dark matter candidates. Notably, we identify scenarios where both DM particles contribute comparably to the observed relic density, offering distinctive experimental signatures that could guide future searches.