Low-scale Gaugino Mass Unification

TL;DR

This paper explores a new class of models where gaugino masses unify at the weak scale, highlighting the stability and naturalness of this unification, and contrasting it with existing models.

Contribution

It introduces a novel scenario of low-scale gaugino mass unification, especially focusing on mirage gauge mediation and its distinctive features.

Findings

Gaugino masses unify naturally at the weak scale.

Scalar quark and lepton masses are non-universal and tied to gauge couplings.

The gravitino is heavy and not the lightest superparticle.

Abstract

We study a new class of scenarios with the gaugino mass unification at the weak scale. The general condition is first derived for the unification to occur. Among the general cases, a particular attention is drawn to the mirage gauge mediation where the low-energy mass spectrum is governed by the mirage of unified gauge coupling which is seen by low-energy observers. The gaugino masses have natural and stable low-scale unification. The mass parameters of scalar quarks and leptons are given by gauge couplings but exhibit no large mass hierarchy. They are non-universal even when mediated at the gauge coupling unification scale. In addition, the gravitino is rather heavy and not the lightest superparticle. These facts are in contrast to existing gauge and mirage mediation models. We also present several explicit models for dynamically realizing the TeV-scale unification.