Studying Gaugino Mass in Semi-Direct Gauge Mediation

TL;DR

This paper investigates gaugino mass generation in semi-direct gauge mediation models, clarifying the cancellation mechanisms and proposing ways to achieve non-zero gaugino masses through model modifications.

Contribution

It provides a detailed analysis of the cancellation of leading gaugino mass contributions and suggests methods to modify models for non-vanishing gaugino masses.

Findings

Cancellation of leading gaugino mass contributions explained

Conditions for non-zero gaugino mass identified

Model retrofit strategies proposed

Abstract

We study gaugino mass generation in the context of semi-direct gauge mediation models, where the messengers are charged under both the hidden sector and the standard model gauge groups while they do not play important roles in dynamical supersymmetry breaking. We clarify the cancellation of the leading contributions of the supersymmetry breaking effects to the gaugino mass in this class of models in terms of the macroscopic effective theory of the hidden sector dynamics. We also consider how to retrofit the model so that we obtain the non-vanishing leading contribution to the gaugino mass.