Neutrino mass matrix in Anti-CUT with see-saw mechanism

We have investigated the predictions of neutrino oscillations within extend ed Anti-GUT, based on a Large gauge group - the Standard Model and an B-L a belian group assumed with separate gauge fields coupling to each family of quarks and leptons - (i = 1,2,3) (x) (SMCi x U(1)(B-L,i)) We take into acco unt corrections concerning a crude way of accounting for the number of ways the vacuum expectation values of the Higgs fields of the model can be orde red in the Feynman diagrams yielding the mass matrix elements. Performing t hese corrections in a balanced way between the charged fermion sector and t he neutrino sector (case I) leads to the previous version of our model that was a fit to the MSW small angle solution region. The fit considered here is marginally worse that the previous fit inasmuch as it predicts a somewha t lower solar neutrino mass square difference (which might though be the on ly way of avoiding the day-night exclusion region). The other two versions (case II and case III) are characterised by the heaviest of the see-saw neu trino matrix elements that are composed either of v(R mu) and v(R tau) or t wo v(R tau). These cases II and III fit the small mixing angle MSW scenario very well. (C) 2001 Elsevier Science B.V. All rights reserved.