Supersymmetry, local horizontal unification, and a solution to the flavor puzzle

Details Supersymmetry, local horizontal unification, and a solution to the flavor puzzle Supersymmetry, local horizontal unification, and a solution to the flavor puzzle

1999-06-07

arxiv.org/abs/hep-ph/9906271v1

Phys.Rev.Lett. 83 (1999) 2522-2525

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages in RevTeX

Scientific paper

10.1103/PhysRevLett.83.2522

Supersymmetric gauge models with local horizontal symmetries are known to generate large flavor changing neutral current effects induced by supersymmetry breaking D-terms. We show how the presence of a U(1) gauge symmetry solves this problem. We then construct a realistic gauge model with SU(2)_H x U(1)_H as the local horizontal symmetry and suggest that the U(1)_H factor may be identified with the anomalous U(1) induced by string compactification. This model explains the observed hierarchies among the quark masses and mixing angles, accommodates naturally the solar and atmospheric neutrino data, and provides simultaneously a solution to the supersymmetric flavor problem. The model can be excluded if the rare decay \mu --> e \gamma is not observed in the current round of experiments.

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