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.

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.