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arXiv · 0907.3523

Fermion Flavor in Soft-Wall AdS

Tony Gherghetta·Daniel Sword
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Abstract

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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Tony Gherghetta, Daniel Sword. 2009-07-21. Fermion Flavor in Soft-Wall AdS. https://doi.org/10.1103/physrevd.80.065015

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