Trilinear gauge boson couplings in the gauge-Higgs unification

We examine trilinear gauge boson couplings (TGCs) in the context of the $SU(3{)}_W\otimes U(1{)}^{\mathrm{\prime }}$ gauge-Higgs unification scenario. The TGCs play important roles in the probes of the physics beyond the standard model, since they are highly restricted by the experiments. We discuss mass spectrum of the neutral gauge boson with brane-localized mass terms carefully and find that the TGCs and $\rho$ parameter may deviate from standard model predictions. Finally we put a constraint from these observables and discuss the possible parameter space.