Phase transitions and gravitational waves in a non-abelian vector dark matter scenario
Abstract
We study a scenario where the Standard Model is extended by a SU(2) gauge group in the dark sector. The three associated dark gauge bosons are stabilised via a custodial symmetry triggered by an additional dark SU(2) scalar doublet, thus making them viable dark-matter candidates. After considering the most recent constraints for this model, we analyse the phase transition dynamics and compute the power spectrum of resulting stochastic gravitational-wave background. Finally, we find regions of the parameter space yielding the observed dark-matter relic density while also leading to strong enough phase transition with an associated gravitational-wave signal reaching the sensitivity of future space-based gravitational-wave detector, such as LISA, DECIGO, BBO, TianQin or Taiji.
Cite
@article{arxiv.2506.22248,
title = {Phase transitions and gravitational waves in a non-abelian vector dark matter scenario},
author = {Nico Benincasa and Luigi Delle Rose and Luca Panizzi and Maimoona Razzaq and Savio Urzetta},
journal= {arXiv preprint arXiv:2506.22248},
year = {2025}
}
Comments
22 pages and 11 figures. Version accepted for publication in PRD