Asymmetric Dark Matter from Gravitational Waves

TL;DR

This paper explores how gravitational wave signals from early Universe phase transitions can be used to detect and study models of asymmetric dark matter that involve extended gauge symmetries and baryogenesis.

Contribution

It introduces a new model extending the Standard Model with a non-Abelian gauge symmetry, linking dark matter, baryogenesis, and gravitational wave signatures.

Findings

Predicts a strong first order phase transition producing detectable gravitational waves.

Shows the model can simultaneously explain baryogenesis and dark matter.

Identifies parameter space accessible to near-future gravitational wave experiments.

Abstract

We investigate the prospects for probing asymmetric dark matter models through their gravitational wave signatures. We concentrate on a theory extending the Standard Model gauge symmetry by a non-Abelian group, under which leptons form doublets with new fermionic partners, one of them being a dark matter candidate. The breaking of this new symmetry occurs at a high scale, and results in a strong first order phase transition in the early Universe. The model accommodates baryogenesis in an asymmetric dark matter setting and predicts a gravitational wave signal within the reach of near-future experiments.