Seesaw neutrino masses and mixing with extended democracy
arXiv:hep-ph/0012055 · doi:10.1016/S0920-5632(01)01459-1
Abstract
In the context of a minimal extension of the Standard Model with three extra heavy right-handed neutrinos, we propose a model for neutrino masses and mixing based on the hipothesis of a complete alignment of the lepton mass matrices in flavour space. Considering a uniform quasi-democratic structure for these matrices, we show that, in the presence of a highly hierarchical right-handed neutrino mass spectrum, the effective neutrino mass matrix, obtained through the seesaw mechanism, can reproduce all the solutions of the solar neutrino problem.
Latex, 3pages. Uses espcrc2.sty. Talk given at the Europhysics Neutrino Oscillation Workshop - NOW 2000. To appear in Nucl. Phys. B, Proceedings Supplements