Two-Component Dark Matter with an SU(2) Dark Sector

TL;DR

This paper introduces a two-component dark matter model with a non-Abelian SU(2) dark sector, stabilized by a residual Z3 symmetry, and explores its theoretical consistency and experimental viability.

Contribution

It presents a novel two-component dark matter model with an SU(2) dark sector and analyzes its compatibility with various theoretical and experimental constraints.

Findings

Viable parameter spaces identified for the model.

Two benchmark points exemplify consistent scenarios.

Model satisfies relic density and detection constraints.

Abstract

We propose an extension to the standard model incorporating a dark sector with a non-Abelian SU(2) gauge symmetry. The model yields stable dark matter candidates, protected by a residual $Z_3$ symmetry arising after the spontaneous symmetry breaking. The dark sector interacts with the SM via a Higgs portal, facilitated from mixing between the SM Higgs doublet and a dark scalar singlet. The model features two distinct DM components. We analyze theoretical and experimental constraints, including perturbativity, unitarity, vacuum stability, dark matter relic density, direct detection, indirect detection, Higgs invisible decays, dark radiation, and ellipticity. Our findings identify viable parameter spaces that satisfy these constraints, as exemplified by two benchmark points.