Strong first order electroweak phase transition in gauge-Higgs unification at finite temperature

摘要

We analyze the electroweak phase transition at finite temperature in a model of gauge-Higgs unification where the fermion mass hierarchy including top quark mass, a viable electroweak symmetry breaking, and an observed Higgs mass are successfully reproduced. To study the phase transition, we employ the ζ function regularization method which is a well-known technique because the Kaluza-Klein mass spectrum is not determined exactly. Applying to our model of gauge-Higgs unification, the strong first order phase transition is realized in our model.