Realistic split fermion models

Abstract

The standard model flavor structure can be explained in theories where the fermions are localized on different points in a compact extra dimension. We explain how models with two bulk scalars compactified on an orbifold can produce such separations in a natural way. We show that, generically, models of Gaussian overlaps are unnatural since they require very large Yukawa couplings between the fermions and the bulk scalars. We present a two scalar model that accounts naturally for the quark flavor parameters and in particular yields order one CP violating phase.

4 pages 1 figure. Talk presented by Gilad Perez at PASCOS '03, 9th International Symposium on Particles, Strings and Cosmology, January 2003, Mumbai, India

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