Gaugino mass non-universality in an SO(10) supersymmetric Grand Unified Theory: low-energy spectra and collider signals

TL;DR

This paper derives non-universal gaugino mass ratios in an SO(10) GUT framework, explores their low-energy phenomenology, and analyzes collider signals at the LHC to distinguish these models from minimal supergravity scenarios.

Contribution

It provides a corrected calculation of gaugino mass ratios in SO(10) GUT with non-singlet Higgs representations and studies their phenomenological implications at colliders.

Findings

Distinct low-energy gaugino spectra from SO(10) breaking patterns.

Potential collider signatures differentiating from mSUGRA.

Compatibility with dark matter relic density constraints.

Abstract

We derive the non-universal gaugino mass ratios in a supergravity (SUGRA) framework where the Higgs superfields belong to the non-singlet representations {\bf 54} and {\bf 770} in a SO(10) Grand Unified Theory (GUT). We evaluate the ratios for the phenomenologically viable intermediate breaking chain $SU(4)_C \times SU(2)_L \times SU(2)_R (G_{422})$. After a full calculation of the gaugino mass ratios, noting some errors in the earlier calculation for {\bf 54}, we obtain, using the renormalisation group equations (RGE), interesting low scale phenomenology of such breaking patterns. Here, we assume the breaking of the SO(10) GUT group to the intermediate gauge group and that to the Standard Model (SM) take place at the GUT scale itself. We also study the collider signatures in multilepton channels at the Large Hadron Collider (LHC) for some selected benchmark points allowed by the cold dark matter relic density constraint provided by the WMAP data and compare these results with the minimal supergravity (mSUGRA) framework with similar gluino masses indicating their distinguishability in this regard.