Fermion Mass Hierarchy from the Soft Wall

Details Fermion Mass Hierarchy from the Soft Wall Fermion Mass Hierarchy from the Soft Wall

2009-05-07

arxiv.org/abs/0905.1095v2

Phys.Rev.D80:024030,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 4 figures, minor changes, one figured added, version to be publish in PRD

Scientific paper

10.1103/PhysRevD.80.024030

We develop a 5d model for ElectroWeak physics based on a non compact warped extra dimension of finite length, known as the soft wall scenario, where all the dynamical degrees of freedom propagate in the 5d bulk. We solve the equations of motion and find the allowed spectra, showing that the mass of the lightest fermionic mode behaves as a power law of the effective 4d Yukawa coupling constant, with the exponent being the corresponding fermionic 5d bulk mass. Precisely this non universal behavior allows us to reproduce the hierarchy between the Standard Model (SM) fermion masses (from neutrinos to the top quark) with non-hierarchical fermionic bulk masses.

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