Fermion Masses and Mixing in Thick Branes

Abstract

Fermion masses and mixing, both in the quark and leptonic sector, are discussed within the approach to the Yukawa puzzle proposed by Arkani-Hamed and Schmaltz. In the quark sector we have shown that at least two extra dimensions are necessary in order to obtain sufficient CP violation, while reproducing the correct quark mass spectrum and mixing angles. We have also studied the consequences of suppressing lepton number violating charged lepton decays within this scenario for lepton masses and mixing angles.