A Model for Fermion Mass Hierarchies and Mixings
Abstract
Description
We present a model which contains three Abelian symmetries beyond the standard model. One is anomalous {\it \` a la} Green-Schwarz, and family-independent; the other two are family symmetries. All are broken at a large scale by stringy effects. The model is predictive in the neutrino sector: large mixing between $ν_μ-ν_τ$, and {\cal O}$(λ^3)$ $ν_e-ν_μ$ mixings. Its natural cut-off is the gauge unification scale, orders of magnitude below the perturbative string cut-off.
11 pages, uses sprocl.sty
11 pages, uses sprocl.sty