# XTE J1814-338 as a strange star admixed with bosonic dark matter

## TL;DR

This paper proposes that the compact star XTE J1814-338 can be modeled as a strange star with a significant admixture of bosonic dark matter, providing constraints on dark matter particle properties.

## Contribution

It introduces a novel model of a strange star with bosonic dark matter and derives a robust, formation-independent constraint on dark matter particle mass.

## Key findings

- Dark matter fraction exceeds 70% in the star.
- Derived upper limit on dark matter particle mass: approximately 307 MeV.
- Model is testable with future NICER and LIGO/Virgo observations.

## Abstract

We show that the compact star XTE J1814-338 can be explained as a strange star admixed with self-interacting bosonic dark matter (BDM), provided the dark matter fraction exceeds approximately 70\%. This interpretation leads to a robust constraint on the BDM particle mass: $m_\chi \lesssim 307(\lambda/\pi)^{1/4}$ MeV ($\lambda$ is the dimensionless coupling constant of the BDM). The result is independent of formation scenario and microphysical details and is falsifiable by future NICER and LIGO/Virgo observations.