A Predictive Minimal Model for Neutrino Masses and Mixings

Abstract

A model is considered in which the scale of the heavy singlet neutrinos is a few orders of magnitude below the grand unification scale and where right-handed vector bosons play still a negligible role. In a basis with diagonal up-quark and Dirac-neutrino mass matrices it is assumed that the heavy neutrino mass matrix has only zero elements in its diagonal, in analogy to the light neutrino mass matrix in the Zee model. Connecting then the remaining matrix elements with the small parameter describing the hierarchy of quark masses and mixings and by assuming commutativity of the charged lepton with the down-quark mass matrix, the calculation of all neutrino properties can be performed in terms of the two mass differences relevant for atmospheric and solar neutrino oscillations. CP-violation is directly related to CP-violation in the quark sector.

revtex, 9 pages, two references added, to be published in Phys. Rev. D presented at Neutrino' 2000, Sudbury, Canada

References in corpus (7)

• Neutrino Masses and Mixings: a Theoretical Perspective
• Large Neutrino Mixing from Small Quark and Lepton Mixings
• Bimaximal Mixing in an SO(10) Minimal Higgs Model
• Zee Neutrino Mass Model in SUSY Framework
• Stability of Neutrino Mass Degeneracy
• Seesaw mechanism, quark-lepton symmetry and Majorana phases
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• Fermion Masses and Coupling Unification in E6. Life in the Desert
• Prospects of Very Long Base-Line Neutrino Oscillation Experiments with the KEK-JAERI High Intensity Proton Accelerator
• The Problem of Large Leptonic Mixing
• Progress on Models of Neutrino Masses and Mixings
• Minimal seesaw mechanism