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 $\zeta$ 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.

• Received 15 November 2019
• Accepted 3 February 2020

DOI:https://doi.org/10.1103/PhysRevD.101.036013

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Published by the American Physical Society