# Gravitational Waves from a Pati-Salam Phase Transition

## TL;DR

This paper investigates gravitational wave signals from a Pati-Salam phase transition at around 10^5 GeV, showing potential detectability by future ground-based interferometers and exploring related low-energy constraints.

## Contribution

It provides the first analysis linking Pati-Salam phase transition gravitational waves with low-energy phenomenology and experimental constraints.

## Key findings

- Gravitational wave spectrum within reach of Einstein Telescope.
- Proton lifetime constraints compatible with the phase transition scale.
- Complementarity with electroweak and neutrino measurements.

## Abstract

We analyse the gravitational wave and low energy signatures of a Pati-Salam phase transition. For a Pati-Salam scale of $M_{PS} \sim 10^5$ GeV, we find a stochastic power spectrum within reach of the next generation of ground-based interferometer experiments such as the Einstein Telescope, in parts of the parameter space. We study the lifetime of the proton in this model, as well as complementarity with low energy constraints including electroweak precision data, neutrino mass measurements, lepton flavour violation, and collider constraints.