SQCD Inflation & SUSY Breaking

TL;DR

This paper presents a supersymmetric QCD-based inflation model that naturally incorporates metastable SUSY breaking and gauge mediation, linking inflation dynamics with supersymmetry breaking and standard model reheating.

Contribution

It introduces a novel hybrid inflation model within supersymmetric QCD that naturally leads to metastable SUSY breaking and compatible gauge mediation mechanisms.

Findings

Successful integration of inflation and SUSY breaking sectors.

Reheating via thermalization of ISS messengers.

All scales are tied to a single quark mass parameter.

Abstract

A model of generalised hybrid inflation in a supersymmetric QCD theory is proposed whose parameters are the gauge coupling and quark masses. Its gravitational coupling to another SQCD sector induces a metastable supersymmetry breaking vacuum of the ISS type as ISS quarks become massive at the end of inflation. Using a known mechanism with a gravitational breaking of the baryon number and the gauging of flavour symmetries, we find that gauge mediation of supersymmetry breaking is compatible with the dynamics of the inflation sector. Reheating proceeds via the thermalization of the ISS messengers into the standard model states. This setup contains a single dimensionful parameter in the form of a quark mass term in the inflationary sector, i.e. all other scales involved are either related to this single mass parameter or dynamically generated.