Fermion flavor in the soft-wall AdS model
Tony Gherghetta, Daniel Sword
PHYSICAL REVIEW D | AMER PHYSICAL SOC | Published : 2009
The formalism for modeling multiple fermion generations in a warped extra dimension with a soft wall is presented. A bulk Higgs condensate is responsible for generating mass for the zero-mode fermions but leads to additional complexity from large mixing between different flavors. We extend existing single-generation analyses by considering new special cases in which analytical solutions can be derived. The general three-generation case is then treated using a simple numerical routine. Assuming anarchic 5D parameters, we find a fermion mass spectrum resembling the standard model quarks and leptons with highly degenerate couplings to Kaluza-Klein gauge bosons. This confirms that the soft-wall ..View full abstract
We thank Brian Batell, Thomas Kelley, Arkady Vainshtein, and Mikhail Voloshin for helpful discussions. The work of T. G. is supported by the Australian Research Council while that of D. S. is supported by a Fellowship from the School of Physics and Astronomy at the University of Minnesota.