Hidden SUSY from precision gauge unification

TL;DR

This paper explores how naturalness and gauge unification in the MSSM imply a compressed gaugino spectrum, relaxing collider constraints and naturally aligning the LSP relic density with dark matter observations.

Contribution

It demonstrates that precision gauge unification with a small mu parameter leads to a specific gaugino pattern in mirage mediation, impacting collider and dark matter phenomenology.

Findings

Compressed gaugino spectrum relaxes gluino mass limits.

LSP relic density naturally matches observed dark matter density.

Small mass difference enables coannihilation effects.

Abstract

We revisit the implications of naturalness and gauge unification in the MSSM. We find that precision unification of the couplings in connection with a small mu parameter requires a highly compressed gaugino pattern as it is realized in mirage mediation. Due to the small mass difference between gluino and LSP, collider limits on the gluino mass are drastically relaxed. Without further assumptions, the relic density of the LSP is very close to the observed dark matter density due to coannihilation effects.