# Vector Self-Interacting Dark Matter

## TL;DR

This paper introduces a vector dark matter model with a low-mass vector mediator, exploring its stability, thermal relic abundance, self-interactions, and potential interactions with the Standard Model, addressing small-scale structure issues.

## Contribution

It proposes a novel vector dark matter framework based on a broken SU(2) gauge symmetry with residual global symmetries ensuring stability.

## Key findings

- Model achieves stable dark matter due to residual global symmetries.
- Self-interactions can address small-scale structure problems.
- Potential for Standard Model interactions via the vector mediator.

## Abstract

We present a model of vector dark matter that interacts through a low-mass vector mediator based on the Higgsing of an SU(2) dark sector. The dark matter is charged under a U(1) gauge symmetry. Even though this symmetry is broken, the residual global symmetries of the theory prevent dark matter decay. We present the behavior of the model subject to the assumption that the dark matter abundance is due to thermal freeze out, including self-interaction targets for small scale structure anomalies and the possibility of interacting with the Standard Model through the vector mediator.