Quark masses and mixings in the RS1 model with a condensing 4th generation

Details Quark masses and mixings in the RS1 model with a condensing 4th generation Quark masses and mixings in the RS1 model with a condensing 4th generation

2012-01-04

arxiv.org/abs/1201.0878v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Minor changes. Version accepted for publication in JHEP

Scientific paper

We study the hierarchy of quark masses and mixings in a model based on a 5-dimensional spacetime with constant curvature of Randall-Sundrum type with two branes, where the Electroweak Symmetry Breaking is caused dynamically by the condensation of a 4th generation of quarks, due to underlying physics from the 5D bulk and the first KK gluons. We first study the hierarchy of quark masses and mixings that can be obtained from purely adjusting the profile localizations, finding that realistic masses are not reproduced unless non trivial hierarchies of underlying 4-fermion interactions from the bulk are included. Then we study global U(1) symmetries that can be imposed in order to obtain non-symmetric modified Fritzsch-like textures in the mass matrices that reproduce reasonably well quark masses and CKM mixings.

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