Towards A Realistic Grand Gauge-Higgs Unification Scenario

TL;DR

This paper explores a realistic 5D SU(6) grand gauge-Higgs unification model that naturally incorporates standard model particles, forbids proton decay at tree level, and achieves proper electroweak symmetry breaking.

Contribution

It presents a minimal 5D SU(6) model with realistic fermion content, no exotic states, and mechanisms for electroweak symmetry breaking within gauge-Higgs unification.

Findings

Proton decay is forbidden at tree level.

Electroweak symmetry breaking is successfully realized.

Standard model fermions are accommodated without exotic states.

Abstract

In this talk, we discuss an attempt to construct a realistic model of the grand gauge-Higgs unification. We investigate a 5D SU(6) grand gauge-Higgs unification model compactified on an orbifold S^1/Z_2. Ordinary quarks and leptons, together with right-handed neutrinos, are just accommodated into a minimal set of representations of the gauge group, without introducing any exotic states in the same representations. The proton decay turns out to be forbidden at least at the tree level. We also find a correct electroweak symmetry breaking SU(2)_L \times U(1)_Y \to U(1)_{em} is easily realized by introducing suitable number of adjoint fermions.