Fermion Flavor in Soft-Wall AdS

Details Fermion Flavor in Soft-Wall AdS Fermion Flavor in Soft-Wall AdS

2009-07-21

arxiv.org/abs/0907.3523v1

Phys.Rev.D80:065015,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 8 figures

Scientific paper

10.1103/PhysRevD.80.065015

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 and discuss flavor constraints. 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 model has similar attractive features as that found in hard-wall models, providing a framework to generalize existing phenomenological analyses.

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