Dynamical symmetry breaking in gauge-Higgs unification on an orbifold

We study the dynamical symmetry breaking in the gauge-Higgs unification of the five-dimensional theory compactified on an orbifold, S^1/Z₂. This theory identifies Wilson line degrees of freedom as ``Higgs doublets. '' We consider SU (3) ₂SU (3) ₖ and SU (6) models with the compactification scale of order of a few TeV. The gauge symmetries are reduced to SU (3) ₂SU (2) ₋U (1) ₘ and SU (3) ₂SU (2) ₋U (1) ₘ (1), respectively, through the orbifolding boundary conditions. We estimate the one loop effective potential of ``Higgs doublets, '' and find that the electroweak breaking is realized through the radiative corrections when there are suitable numbers of bulk fields possessing the suitable representations. The masses of ``Higgs doublets'' are O (100) GeV in this scenario.