On Gauge Mediation and Cosmological Vacuum Selection

TL;DR

This paper examines the interplay between gauge and gravity mediation in supersymmetry breaking models, highlighting cosmological challenges and the influence of quantum corrections and U(1) groups on vacuum stability.

Contribution

It identifies how quantum corrections and U(1) groups affect the dominance of gauge mediation and the cosmological viability of metastable vacua in supersymmetry models.

Findings

Gravity limits the admixture of gravity mediation in certain models.

Metastable vacua are cosmologically disfavoured in some stabilized models.

Quantum corrections influence the stability and mediation mechanisms.

Abstract

Gauge mediation of supersymmetry breakdown has many attractive features and can be realized in phenomenologically interesting string-motivated models. We point out that in models with the Polonyi-like field stabilized at a low expectation value by quantum corrections, gravity seems to limit from above the admixture of gravity mediation to the dominant gauge mediation channel. However, we also point out that in a class of such models the low energy metastable supersymmetry breaking vaccum appears to be cosmologically disfavoured. These features should hold also in the case of typical stabilized models with anomalous U(1) groups.