Higgs and Sparticle Spectroscopy with Gauge-Yukawa Unification

TL;DR

This paper investigates the Higgs and sparticle spectra in supersymmetric models with gauge-Yukawa unification, exploring various dark matter solutions and the effects of different gaugino mass signs and top quark mass variations.

Contribution

It introduces a class of models with unified gauge and Yukawa couplings at the GUT scale, obtained via higher-dimensional compactification, and analyzes their phenomenological implications.

Findings

Multiple gauge-Yukawa unification scenarios identified.

Various dark matter solutions compatible with WMAP data found.

Sign variations in gaugino masses affect unification and dark matter properties.

Abstract

We explore the Higgs and sparticle spectroscopy of supersymmetric SU(4)_c x SU(2)_L x SU(2)_R models in which the three MSSM gauge couplings and third family (t-b-tau) Yukawa couplings are all unified at M_GUT. This class of models can be obtained via compactification of a higher dimensional theory. Allowing for opposite sign gaugino masses and varying m_t within 1 sigma of its current central value yields a variety of gauge-Yukawa unification as well as WMAP compatible neutralino dark matter solutions. They include mixed bino-Higgsino dark matter, stau and gluino coannihilation scenarios, and the A-resonance solution.