Gravitational Waves from dark composite dynamics

TL;DR

This paper investigates the gravitational-wave signals produced by dark confinement and phase transitions in the early Universe, using lattice data and effective models to predict signals detectable by future observatories.

Contribution

It introduces a method to compute gravitational-wave spectra from dark sector phase transitions using lattice data and effective models, applicable to various gauge theories.

Findings

Predicted gravitational-wave signals from dark confinement are within reach of future detectors.

Effective models can reliably estimate gravitational-wave spectra from dark sector phase transitions.

Comparison shows potential detectability of signals by Big Bang Observer and DECIGO.

Abstract

We discuss the stochastic gravitational-wave spectrum from dark confinement and chiral phase transitions in the early Universe. Specifically, we look at pure Yang-Mills theory for an arbitrary number of colours as well as SU(3) with quarks in different representations. We utilise thermodynamic lattice data and map it to effective models, such as the Polyakov-loop and the PNJL model. This allows us to compute gravitational-wave parameters and the corresponding gravitational-wave signal. We compare the signal to future gravitational-wave observatories such as the Big Bang Observer and DECIGO.