Flavor Problem, Proton Decay And Neutrino Oscillations In SUSY Models With Anomalous ${\cal U}(1)$

Details Flavor Problem, Proton Decay And Neutrino Oscillations In SUSY Models With Anomalous ${\cal U}(1)$ Flavor Problem, Proton Decay And Neutrino Oscillations In SUSY Models With Anomalous ${\cal U}(1)$

1999-11-06

arxiv.org/abs/hep-ph/9911264v2

Phys.Lett.B473:272-280,2000; Phys.Lett.B481:445-446,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

Additional references included. Version to appear in Phys. Lett.B

Scientific paper

10.1016/S0370-2693(99)01433-1

We discuss how realistic supersymmetric models can be constructed by employing an anomalous ${\cal U}(1)$ flavor symmetry which also mediates supersymmetry breaking. A judicious choice of ${\cal U}(1)$ charges enables the first two squark families to be sufficiently heavy ($\stackrel{>}{_\sim}10$ TeV), so that flavor changing neutral currents as well as dimension five nucleon decay are adequately suppressed. Using the SU(5) example, the charged fermion mass hierarchies, magnitudes of the CKM matrix elements, as well as the observed neutrino oscillations are simultaneously accommodated. We estimate the proton lifetime to be $\tau_p\sim 10^3\cdot \tau_p[{\rm minimal} SU(5)]$, with the decay mode $p\to K\mu $ being comparable to $p\to K\nu_{\mu, \tau}$.

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