Coannihilation Scenarios and Particle Spectroscopy in SU(4)_c x SU(2)_L x SU(2)_R

TL;DR

This paper explores coannihilation scenarios in a supersymmetric SU(4)_c x SU(2)_L x SU(2)_R model, highlighting the role of non-universal gaugino masses in dark matter compatibility and addressing the little hierarchy problem.

Contribution

It introduces specific coannihilation regions with non-universal gaugino masses in a left-right symmetric model, providing benchmark points and mass spectra.

Findings

Gluino and bino-wino coannihilation regions compatible with dark matter constraints.

Partial resolution of the little hierarchy problem.

Benchmark points with detailed sparticle and Higgs spectra.

Abstract

We identify a variety of coannihilation scenarios in a supersymmetric SU(4)_c x SU(2)_L x SU(2)_R model with discrete left-right symmetry. Non-universal gaugino masses, compatible with the gauge symmetry, play an essential role in realizing gluino and bino-wino coannihilation regions that are consistent with the WMAP dark matter constraints. We also explore regions of the parameter space in which the little hierarchy problem is partially resolved. We present several phenomenologically interesting benchmark points and the associated sparticle and Higgs mass spectra.