Large top mixing from extra dimensions

Details Large top mixing from extra dimensions Large top mixing from extra dimensions

2000-11-10

arxiv.org/abs/hep-ph/0011143v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, contribution to NATO Advanced Study Institute 2000 "Recent Developments in Particle Physics and Cosmology"

Scientific paper

Fermion mixing is conveniently described using the effective Lagrangian formalism. We apply this approach to study top mixing in models with an infinite tower of Kaluza-Klein fermion excitations. In the Randall-Sundrum background with a boundary Higgs and phenomenologically viable values of the model parameters, the only effect eventually observable is the loss of universality of the top couplings. Their deviation from the SM predictions can be up to 4 % if the five-dimensional Yukawa couplings times the AdS_5 curvature scale are < 10.

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