Vector Portal Pseudo-Goldstone Dark Matter

TL;DR

This paper introduces a pseudo-Goldstone dark matter model with a light vector mediator, exploring its relic abundance, self-interactions, and potential interactions with the Standard Model within a spontaneously broken SU(2) dark sector.

Contribution

It proposes a novel pseudo-Goldstone dark matter framework with a light vector mediator and analyzes its relic abundance, self-interactions, and Standard Model interactions.

Findings

Dark matter mass generated by explicit SU(2) breaking

Model can account for observed relic abundance via thermal freeze-out

Potential to address small scale structure anomalies

Abstract

We present a model of pseudo-Goldstone dark matter that interacts through a light vector mediator based on a spontaneously broken $SU(2)$ dark sector. The dark matter mass is induced by the explicit breaking of the dark $SU(2)$ symmetry. A residual global $U(1)$ symmetry prevents dark matter decay. The behavior of this model is studied under the assumption that the observed dark matter relic abundance is due to thermal freeze-out. We consider self-interaction targets for small scale structure anomalies and the possibility of interacting with the Standard model through the vector mediator.