Low Scale Direct Gauge Mediation with Perturbatively Stable Vacuum

TL;DR

This paper examines a class of direct gauge mediation models with stable SUSY breaking vacua, finding most parameter space excluded by current experimental bounds, but leaving room for future discovery or exclusion.

Contribution

It analyzes the parameter space of perturbatively stable direct gauge mediation models under experimental constraints, highlighting their viability and limitations.

Findings

Most parameter space is excluded by current bounds.

Future experiments could fully test or rule out the scenario.

The model predicts specific mass ranges for gauginos and gravitinos.

Abstract

In a class of direct gauge mediation with a perturbatively stable SUSY breaking vacuum, gaugino masses vanish at the leading order of SUSY breaking F-term. We study the allowed parameter space of the gauge mediation models. By imposing a Tevatron bound on the lightest chargino mass m_{{\tilde \chi}^\pm_1} > 270 GeV and a warm dark-matter mass bound on the light gravitino mass m_{3/2} < 16 eV, we find that almost all the parameter space is excluded. Near future experiments may completely exclude, or possibly discover, the scenario.