Xing, ZZX (reprint author), CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
Taking three right-handed Majorana neutrino masses M-i to be partially non-degenerate, we make a new analysis of the Fukugita-Tanimoto-Yanagida ansatz and confront it with current neutrino oscillation data. We determine the parameter space for cases (A) M-3 = M-2 not equal M-1, (B) M-2 = M-1 not equal M-3 and (C) M-1 = M-3 not equal M-2, and examine their respective deviations from the original M-1 = M-2 = M-3 case. The numerical constraints on three light neutrino masses, three neutrino mixing angles and three CP-violating phases are also obtained, together with the predictions for the Jarlskog invariant of CP violation and the effective masses of the tritium beta decay and the neutrinoless double-beta decay. (c) 2006 Elsevier B.V. All rights reserved.