A Note on Fine-Tuning in Mirage Mediation

TL;DR

This paper examines fine-tuning in mirage mediation, a supersymmetry breaking scenario inspired by string theory, finding it requires less fine-tuning than other mechanisms due to lighter gluinos.

Contribution

It provides an analysis of electroweak fine-tuning in mirage mediation, highlighting its advantages over other supersymmetry breaking scenarios.

Findings

Lighter gluinos reduce fine-tuning in mirage mediation.

Fine-tuning is smaller compared to other mediation mechanisms.

The scenario addresses cosmological gravitino/moduli problems.

Abstract

Recent progress in string theory moduli stabilization has motivated a mixed modulus-anomaly mediated supersymmetry breaking scenario, also dubbed `mirage mediation'. This scenario has a number of phenomenologically attractive features, in particular with respect to the cosmological gravitino/moduli problem. In this note, we investigate the issues of fine-tuning associated with obtaining the correct electroweak symmetry breaking scale in the mirage mediation scenario. We find that, due to lighter gluinos, the fine-tuning is smaller than that in other mediation mechanisms.