Models of Fermion Mass Matrices Based on a Flavor- and Generation-Dependent U(1) Gauge Symmetry

Abstract

We study models of fermion mass matrices based on a flavor- and generation-dependent string-motivated U(1)${}_A$ gauge symmetry and report two new classes of solutions to the requisite consistency conditions. In particular, we propose that the fundamental reason underlying the striking feature $m_b,m_{\tau }<<m_t$ is that all of the elements of the down-quark and charged lepton effective Yukawa matrices actually arise from higher-dimension operators, suppressed by inverse powers of the Plank mass. An explicit model embodying this idea is constructed.

11 pages, latex

References in corpus (3)

• Fermion masses and mixing angles from gauge symmetries
• Supergravity Coupled to Chiral Matter at One Loop
• A New Model for Fermion Masses in Supersymmetric Grand Unified Theories

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