# Vector Coherent Oscillation Dark Matter

## TL;DR

This paper proposes a model of vector boson dark matter as a homogeneous oscillation, which could be distinguished by statistical anisotropy in dark matter perturbations.

## Contribution

It introduces a novel vector boson dark matter model using gauge kinetic coupling, avoiding instabilities and enabling observational differentiation.

## Key findings

- Homogeneous coherent oscillation of vector boson dark matter constructed.
- Potential observational signature through statistical anisotropy.
- Model avoids dangerous instabilities in dark matter formation.

## Abstract

We construct a model of hidden massive vector boson dark matter as a homogeneous coherent oscillation in the entire universe without any dangerous instability. We make use of a particular form of the vector boson coupling to a scalar field through the gauge kinetic function. This scenario may be distinguished from other dark matter models through the observation of statistical anisotropy in the dark matter isocurvature perturbation.