Aspects of Phase Transition in Gauge-Higgs Unification at Finite Temperature

TL;DR

This paper investigates phase transitions in gauge-Higgs unification models at finite temperature, revealing strong first order transitions and multi-stage transitions, with implications for electroweak symmetry breaking.

Contribution

It demonstrates the occurrence of strong first order and multi-stage phase transitions in gauge-Higgs unification models, including supersymmetric cases with Scherk-Schwarz breaking.

Findings

Strong first order electroweak phase transition achieved.

Two-stage phase transition observed for specific matter content.

First order transitions also found in supersymmetric models.

Abstract

We study the phase transition in gauge-Higgs unification at finite temperature. In particular, we obtain the strong first order electroweak phase transition for a simple matter content yielding the correct order of Higgs mass at zero temperature. Two stage phase transition is found for a particular matter content, which is the strong first order at each stage. We further study supersymmetric gauge models with the Scherk-Schwarz supersymmetry breaking. We again observe the first order electroweak phase transition and multi stage phase transition.