Horizontal, Anomalous U(1) Symmetry for the More Minimal Supersymmetric Standard Model

Details Horizontal, Anomalous U(1) Symmetry for the More Minimal Supersymmetric Standard Model Horizontal, Anomalous U(1) Symmetry for the More Minimal Supersymmetric Standard Model

1997-02-18

arxiv.org/abs/hep-ph/9702359v2

Phys.Rev. D56 (1997) 1598-1604

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revised version clarifies calculation of FCNC amplitudes and rules out one model considered previously

Scientific paper

10.1103/PhysRevD.56.1598

We construct explicit examples with a horizontal, ``anomalous'' $U(1)$ gauge group, which, in a supersymmetric extension of the standard model, reproduce qualitative features of the fermion spectrum and CKM matrix, and suppress FCNC and proton decay rates without the imposition of global symmetries. We review the motivation for such ``more'' minimal supersymmetric standard models and their predictions for the sparticle spectrum. There is a mass hierarchy in the scalar sector which is the inverse of the fermion mass hierarchy. We show in detail why DeltaS = 2 FCNC are suppressed when compared with naive estimates for nondegenerate squarks.

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