# Precision gauge unification in the MSSM

## TL;DR

This paper explores how specific supersymmetry breaking patterns, especially light gluinos in the MSSM, can achieve precise gauge unification without extra particles, also reducing fine-tuning.

## Contribution

It demonstrates that a light gluino, particularly in the mirage pattern of gaugino masses, can naturally enable precision gauge unification in the MSSM.

## Key findings

- Light gluinos can ensure gauge unification without extra particles.
- Mirage gaugino mass pattern naturally leads to unification.
- Reduced fine-tuning associated with light gluinos.

## Abstract

We discuss the issue of precision gauge unification in the MSSM. We find that a comparably light gluino, as it emerges in certain patterns of soft supersymmetry breaking, can be a key ingredient for ensuring precision gauge unification without relying on the presence of extra particles around the scale of grand unification. In particular, the so-called mirage pattern for gaugino masses can naturally lead to precision gauge unification. There is also an interesting correlation with reduced fine-tuning, due to rather light gluinos.