Vector dark matter from split SU(2) gauge bosons

TL;DR

This paper introduces a vector dark matter model based on a dark SU(2) gauge symmetry, where Higgs triplets give mass to gauge bosons, and the lightest boson serves as a stable dark matter candidate.

Contribution

It presents a novel vector dark matter model with an exotic gauge group and demonstrates its viability under current experimental constraints.

Findings

Multiple parameter points satisfy all experimental constraints.

The model's methodology can be extended to other gauge groups like SO(N).

Future experiments could further test the model.

Abstract

We propose a vector dark matter model with an exotic dark SU(2) gauge group. Two Higgs triplets are introduced to spontaneously break the symmetry. All of the dark gauge bosons become massive, and the lightest one is a viable vector DM candidate. Its stability is guaranteed by a remaining Z_2 symmetry. We study the parameter space constrained by the Higgs measurement data, the dark matter relic density, and direct and indirect detection experiments. We find numerous parameter points satisfying all the constraints, and they could be further tested in future experiments. Similar methodology can be used to construct vector dark matter models from an arbitrary SO(N) gauge group.