Democratic (S)fermions and Lepton Flavor Violation

Details Democratic (S)fermions and Lepton Flavor Violation Democratic (S)fermions and Lepton Flavor Violation

2002-12-12

arxiv.org/abs/hep-ph/0212172v1

Phys.Rev. D68 (2003) 056007

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 2 figures

Scientific paper

10.1103/PhysRevD.68.056007

The democratic approach to account for fermion masses and mixing is known to be successful not only in the quark sector but also in the lepton sector. Here we extend this ansatz to supersymmetric standard models, in which the K\"ahler potential obeys underlying S_3 flavor symmetries. The requirement of neutrino bi-large mixing angles constrains the form of the K\"ahler potential for left-handed lepton multiplets. We find that right-handed sleptons can have non-degenerate masses and flavor mixing, while left-handed sleptons are argued to have universal and hence flavor-blind masses. This mass pattern is testable in future collider experiments when superparticle masses will be measured precisely. Lepton flavor violation arises in this scenario. In particular, \mu \to e \gamma is expected to be observed in a planning future experiment if supersymmetry breaking scale is close to the weak scale.

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