The paper provides, for the first time, explicit analytical expressions for the two mass-squared differences, three mixing angles, and effective Dirac CP phase of the canonical seesaw mechanism in terms of its 18 parameters, at leading order in small active-sterile mixing.
Lepton Flavor Violation and Neutrino Mixings in a 3X2 Seesaw Model
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abstract
We study the predictions for BR(mu-> e+gamma) and BR(tau-> e,mu+gamma) in a class of recently proposed horizontal SU(2) model that leads to a 3 X 2 seesaw model for neutrino masses. We consider two such models and obtain the correct bi-large mixing pattern for neutrinos. In these models, the effective low energy theory below the SU(2)_H scale is the MSSM. Assuming a supersymmetry breaking pattern as in the minimal SUGRA models, we find that consistent with present g-2, b->s+gamma and WMAP dark matter constraints on the parameters of the model, the BR(mu-> e+gamma) prediction is accessible to the proposed MEG experiment at PSI making this class of models testable in the near future.
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Confronting the seesaw mechanism with neutrino oscillations: a general and explicit analytical bridge
The paper provides, for the first time, explicit analytical expressions for the two mass-squared differences, three mixing angles, and effective Dirac CP phase of the canonical seesaw mechanism in terms of its 18 parameters, at leading order in small active-sterile mixing.