Generation of Asymmetric Dark Matter and Gravitational Waves

TL;DR

This paper explores the potential for gravitational wave signals originating from a strong first-order phase transition in an asymmetric dark matter model, with implications for future observatories like LISA and BBO.

Contribution

It introduces a novel model linking dark matter asymmetry generation with gravitational wave production during a phase transition.

Findings

Gravitational waves from bubble collisions are detectable by future observatories.

The model constrains dark matter properties using halo ellipticity and $\

Constraints from $\

Abstract

We consider the possibility of a gravitational wave signal in an asymmetric dark matter model. In this model a generative sector produces both the baryon asymmetry and a dark matter asymmetry in a strong first-order phase transtion. Bubble collisions during the phase transition lead to sound waves in the plasma which are a source of a stochastic gravitational wave background. We consider the prospects of future graviational wave observatories such as LISA and BBO detecting such a signal. Constraints on the model from Halo ellipticity, $\Delta N_{\rm eff}$ and direct detection experiments are also discussed.