Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-06-02
Int.J.Mod.Phys. A16 (2001) 609-624
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 3 tables, LateX
Scientific paper
We determine the nu_{R} Majorana mass matrix from the experimental data on neutrino oscillations in the framework of a see-saw SO(10) model, where we impose the condition (M^R)_{33} = 0 to avoid too large fine-tunings in the see-saw formula. We find a class of solutions with the two lowest neutrino masses almost degenerate and the scale of the matrix elements of M^R in the range 10^{11} -10^{12} GeV in agreement with Pati-Salam intermediate symmetry. We find also solutions with smaller neutrino masses, for which the scale of M_R depends on the solution to the "solar neutrino problem" and on the value of the component of \nu_e along the highest mass eigenstate, U_{e3}.
Abud Mario
Buccella Franco
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