Supersymmetry Breaking, R-Symmetry Breaking and Metastable Vacua

TL;DR

This paper discusses how metastable supersymmetry breaking models naturally have approximate R-symmetry, which helps address issues with gaugino masses and R-axions, and argues that metastability is an inevitable feature.

Contribution

It demonstrates that metastable supersymmetry breaking models inherently possess approximate R-symmetry, providing insights into R-symmetry breaking mechanisms and their implications.

Findings

Metastable models have approximate R-symmetry.

Spontaneous and explicit R-symmetry breaking issues are illustrated.

Metastability in supersymmetry breaking is argued to be inevitable.

Abstract

Models of spontaneous supersymmetry breaking generically have an R-symmetry, which is problematic for obtaining gaugino masses and avoiding light R-axions. The situation is improved in models of metastable supersymmetry breaking, which generically have only an approximate R-symmetry. Based on this we argue, with mild assumptions, that metastable supersymmetry breaking is inevitable. We also illustrate various general issues regarding spontaneous and explicit R-symmetry breaking, using simple toy models of supersymmetry breaking.