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Neutrino masses and mixings in SO(10)

M. Abud, F. Buccella, D. Falcone, G. Ricciardi, F. Tramontano

hep-pharXiv:hep-ph/9911238

Abstract

Assuming a Zee-like matrix for the right-handed neutrino Majorana masses in the see-saw mechanism, one gets maximal mixing for vacuum solar oscillations, a very small value for Ue3 and an approximate degeneracy for the two lower neutrino masses. The scale of right-handed neutrino Majorana masses is in good agreement with the value expected in a SO(10) model with Pati-Salam SU(4) SU(2) SU(2) intermediate symmetry.

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