Abstract
Supersymmetric gauge models with local horizontal symmetries are known to generate large flavor-changing neutral-current effects induced by supersymmetry breaking terms. We show how the presence of a gauge symmetry solves this problem. We then construct a realistic gauge model with as the local horizontal symmetry and suggest that the factor may be identified with the anomalous of string theory. 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 is not observed in the current round of experiments.
- Received 15 June 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.2522
©1999 American Physical Society