Fermion mass hierarchy and mixing in simplified grand gauge–Higgs unification

Abstract

Abstract Grand gauge–Higgs unification of five-dimensional SU(6) gauge theory on an orbifold S 1/Z 2 with localized gauge kinetic terms is discussed. The Standard Model (SM) fermions on the boundaries and some massive bulk fermions coupling to the SM fermions are introduced. Compared to the previous model, the number of bulk fermions is reduced, which reproduces the generation mixing of SM fermions and SM fermion mass hierarchy by mildly tuning the bulk masses and parameters of the localized gauge kinetic terms.