Fermion pair production at e(-)e(+) linear collider experiments in GUT inspired gauge-Higgs unification

Fermion pair production at e(-)e(+) linear collider experiments with polarized e(-) and e(+) beams is examined in the GUT inspired SO(5) x U(1) x SU(3) gauge-Higgs unification. There arises large parity violation in the couplings of leptons and quarks to Kaluza-Klein (KK) excited neutral vector bosons Z's, which leads to distinctive polarization dependence in cross sections, forward-backward asymmetries, leftright asymmetries, and left-right forward-backward asymmetries in various processes. Those effects are detectable even for the KK mass scale up to about 15 TeV at future e(-)e(+) linear collider experiments with energies 250 GeV to 1 TeV.