Natural composite model for quarks and leptons

Abstract

It is shown that the radial-excitation model of quark/lepton flavor naturally possesses a unitary charged-current matrix and thus ensures the absence of the flavor-changing neutral currents by means of the Glashow-Iliopoulos-Maiani mechanism. The nonvanishing overlap of the quark wave functions gives rise to the mixing angles. The $\mathrm{CP}$-violating phases are small.