Split fermions in extra dimensions and CP violation

We discuss CP violation in the quark sector within a novel approach to the Yukawa puzzle proposed by Arkani-Hamed and Schmaltz. where Yukawa hierarchi es result from localising the Standard Model quark field wave-functions, at different positions tin the extra dimensions) in a "fat-brane". We show th at at least two extra dimensions are necessary in order to obtain sufficien t CP violation, while reproducing the correct quark mass spectrum and mixin g angles. (C) 2001 Published by Elsevier Science B.V.