LHC Reach of Low Scale Gauge Mediation with Perturbatively Stable Vacuum

TL;DR

This paper explores the potential of the LHC to detect or exclude low scale gauge mediation models with a stable vacuum, especially in the context of very light gravitino scenarios, revealing that such models face severe constraints.

Contribution

It demonstrates that low scale gauge mediation models with perturbatively stable vacua can be fully tested or ruled out early in LHC experiments.

Findings

Models can be excluded or discovered early at the LHC.

Severe upper bounds on gaugino masses are identified.

Light gravitino scenarios are strongly constrained.

Abstract

Very light gravitino scenario m_{3/2} < 16 eV is very interesting, since there is no cosmological problem. However in such a scenario, stability of the vacuum is an important issue. Recently, Yonekura and one of the authors RS have investigated the parameter space of a low scale gauge mediation with a perturbatively stable vacuum and found that there are severe upper bound on the gaugino masses. In this paper, we show that such a model can be completely excluded/discovered at very early stage of the LHC run.