Conformal Unification in a Quiver Theory and Gravitational Waves

TL;DR

This paper explores how a specific quiver GUT model could produce detectable gravitational waves from early universe phase transitions, offering insights into high-energy physics beyond the Standard Model.

Contribution

It introduces a quiver GUT model based on SU(3)^{12} that avoids proton decay and examines its gravitational wave signatures from first-order phase transitions.

Findings

The model has a large number of effective degrees of freedom (g_* = 1272).

It predicts gravitational wave signals within the sensitivity of current and future detectors.

The phase transition parameters significantly influence the gravitational wave strain.

Abstract

The detection of a stochastic background of gravitational waves can reveal details about first-order phase transitions (FOPTs) at a time of $10^{-13}s$ of the early universe. We specifically discuss quiver-type GUTs which avoid both proton decay and a desert hypothesis. A quiver based on $SU(3)^{12}$ which breaks at a $E=4000$ GeV to trinification $SU(3)^3$ has a much larger ($g_*=1,272$) number of effective massless degrees of freedom than the Standard Model. Assuming a FOPT for this model we investigate the strain sensitivity of this model for a wide range of FOPT parameters.