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Yukawa Textures and Anomalies

Pierre Binetruy, Pierre Ramond

hep-pharXiv:hep-ph/9412385

Abstract

We augment the Minimal Supersymmetric Standard Model with a gauged family-dependent U(1) to reproduce Yukawa textures compatible with experiment. In the simplest model with one extra chiral electroweak singlet field, acceptable textures require this U(1) to be anomalous. The cancellation of its anomalies by a generic Green-Schwarz mechanism requires 2θw=3/8 at the string scale, suggesting a superstring origin for the standard model.

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