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 mx̃1 ± ≳270 GeV and a warm dark-matter mass bound on the light gravitino mass m3/2≲ 16 eV, we find that almost all the parameter space is excluded. Near future experiments may completely exclude, or possibly discover, the scenario.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics