Cascade supersymmetry breaking and low-scale gauge mediation

TL;DR

This paper introduces cascade supersymmetry breaking models that achieve low gravitino mass while maintaining viable gaugino masses and avoiding vacuum stability issues, advancing gauge mediation theories.

Contribution

It presents a novel class of gauge mediated supersymmetry breaking models with low gravitino mass and stable vacua, addressing key issues in supersymmetry phenomenology.

Findings

Achieves gravitino mass as low as 1 eV without gaugino mass suppression.

Ensures no Landau pole problems below GUT scale.

Models lack supersymmetric vacua near the breaking vacuum, ensuring stability.

Abstract

We propose a new class of models with gauge mediated supersymmetry breaking, the cascade supersymmetry breaking. This class of models is consistent with the gravitino mass as low as O(1)eV without having suppressed gaugino masses, nor the Landau pole problems of the gauge coupling constants of the Standard Model below the scale of the grand unification. In particular, there is no supersymmetric vacuum in the vicinity of the supersymmetry breaking vacuum even for such a low gravitino mass. Thus, the model does not have a vacuum stability problem decaying into supersymmetric vacua.