CKM pattern from localized generations in extra dimension
William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, MN, 55455, USA
2 Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
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Published online: 28 September 2006
We revisit the issue of the quark masses and mixing angles in the framework of large extra dimension. We consider three identical standard model families resulting from higher-dimensional fields localized on different branes embedded in a large extra dimension. Furthermore we use a decaying profile in the bulk different form previous works. With the Higgs field also localized on a different brane, the hierarchy of masses between the families results from their different positions in the extra space. When the left-handed doublet and the right-handed singlets are localized with different couplings on the branes, we found a set of brane locations in one extra dimension which leads to the correct quark masses and mixing angles with the sufficient strength of CP-violation. We see that the decaying profile of the Higgs field plays a crucial role for producing the hierarchies in a rather natural way.
© Springer-Verlag Berlin Heidelberg, 2006