Large neutrino mixing with the universal strength of the Yukawa couplings

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