Gauge-Higgs EW and Grand Unification

TL;DR

This paper explores gauge-Higgs unification in warped space, showing how the Higgs field emerges as a gauge component, predicts new heavy bosons, and extends to grand unification with suppressed proton decay.

Contribution

It demonstrates a successful $SO(5) imes U(1)$ gauge-Higgs unification model in warped space and generalizes it to $SO(11)$ grand unification with natural proton stability.

Findings

Higgs mass is finite and generated at quantum level.

Predicted $Z'$ bosons around 6-10 TeV with broad widths.

Model aligns with Standard Model phenomenology for small $ heta_H$.

Abstract

4D Higgs field is identified with the extra-dimensional component of gauge potentials in the gauge-Higgs unification scenario. $SO(5) \times U(1)$ gauge-Higgs EW unification in the Randall-Sundrum warped space is successful at low energies. The Higgs field appears as an Aharonov-Bohm phase $\theta_H$ in the fifth dimension. Its mass is generated at the quantum level and is finite. The model yields almost the same phenomenology as the standard model for $\theta_H < 0.1$, and predicts $Z'$ bosons around 6 - 10 TeV with very broad widths. The scenario is genelarized to $SO(11)$ gauge-Higgs grand unification. Fermions are introduced in the spinor and vector representations of $SO(11)$. Proton decay is naturally forbidden.