Light Pseudo-Goldstone Higgs Boson from SO(10) GUT with Realistic Phenomenology

TL;DR

This paper proposes a new mechanism within supersymmetric SO(10) GUTs that naturally produces a light pseudo-Goldstone Higgs boson, resulting in a realistic model with proper symmetry breaking, fermion masses, and gauge unification.

Contribution

It introduces an explicit SO(10) GUT model with a pseudo-Goldstone Higgs mechanism, achieving realistic phenomenology and all-order hierarchy.

Findings

Realistic fermion mass patterns achieved

Successful gauge coupling unification demonstrated

Nucleon stability maintained

Abstract

Within the supersymmetric SO(10) grand unified theory (GUT), a new mechanism, giving the light Higgs doublet as a pseudo-Goldstone mode, is suggested. Realizing this mechanism, we present an explicit model with fully realistic phenomenology. In particular, desirable symmetry breaking and natural all-order hierarchy are achieved. The constructed model allows one to have a realistic fermion pattern, nucleon stability, and successful gauge coupling unification. The suggested mechanism opens prospects in the field for a novel $SO(10)$ GUT model building and for further investigations.