Large neutrino mixing with the universal strength of the Yukawa couplings - art. no. 073004

We analyze, within the framework of universal strength for Yukawa couplings (USY), various structures for the Dirac and Majorana neutrino mass matrice s giving rise, through the seesaw mechanism, to a degenerate mass spectrum. A specific USY Ansatz is presented for the charged lepton and neutrino eff ective mass matrix, leading to quasi-degenerate neutrinos and a leptonic mi xing matrix which provides a large angle solution for both the atmospheric and solar neutrino problems.