Discrimination of Supersymmetric Grand Unified Models in Gaugino Mediation

TL;DR

This paper explores how different supersymmetric GUT models can be distinguished by their predicted sparticle mass spectra, focusing on minimal SU(5) and SO(10) models under gaugino mediation.

Contribution

It demonstrates that specific mass differences in sparticles can serve as indicators to differentiate GUT models beyond collider capabilities.

Findings

Significant mass differences in slepton and squark sectors between models.

Discrimination possible with current and future experimental data.

GUT-scale models can be distinguished through low-energy sparticle spectra.

Abstract

We consider supersymmetric grand unified theory (GUT) with the gaugino mediated supersymmetry breaking and investigate a possibility to discriminate different GUT models in terms of predicted sparticle mass spectra. Taking two example GUT models, the minimal SU(5) and simple SO(10) models, and imposing a variety of theoretical and experimental constraints, we calculate sparticle masses. Fixing parameters of each model so as to result in the same mass of neutralino as the lightest supersymmetric particle (LSP), giving the observed dark matter relic density, we find sizable mass differences in the left-handed slepton and right-handed down-type squark sectors in two models, which can be a probe to discriminate the GUT models realized at the GUT scale far beyond the reach of collider experiments.