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A Light Sterile Neutrino Based on the Seesaw Mechanism
2001
Progress of theoretical physics
We propose a simple model of the neutrino mass matrix which can explain the solar and atmospheric neutrino problems in a 3(ν_L + ν_R) framework. Assuming that only two right-handed neutrinos are heavy and a Dirac mass matrix has a special texture, we construct a model with four light neutrinos. The favorable structure of flavor mixings and mass eigenvalues required by those neutrino deficits is realized as a result of the seesaw mechanism. Bi-maximal mixing structure might be obtainable in this
doi:10.1143/ptp.106.587
fatcat:2ei6yljkmnarvcer53nc22nfem