Gravitational Waves from Mini-Split SUSY

TL;DR

This paper explores how Mini-Split SUSY models can produce gravitational waves from early universe phase transitions, potentially detectable at kHz frequencies, revealing new cosmological implications of high-scale supersymmetry.

Contribution

It demonstrates the possibility of gravitational wave signals arising from color-breaking vacua in Mini-Split SUSY, linking high-energy particle physics with observable cosmological phenomena.

Findings

Color-breaking vacua can form at high temperatures in Mini-Split SUSY.

Strong first order phase transitions may produce detectable gravitational waves.

Predicted gravitational wave background peaks around 1 kHz frequency.

Abstract

We show that color-breaking vacua may develop at high temperature in the Mini-Split Supersymmetry (SUSY) scenario. This can lead to a nontrivial cosmological history of the Universe, including strong first order phase transitions and domain wall production. Given the typical PeV energy scale associated with Mini-Split SUSY models, a stochastic gravitational wave background at frequencies around 1 kHz is expected. We study the potential for detection of such a signal in future gravitational wave experiments.