Neutrino Mass Models

Abstract

I review promising approaches to neutrino mass models, focussing on three neutrino patterns of neutrino masses and mixing angles, and the corresponding Majorana mass matrices. I discuss the see-saw mechanism, and show how it may be applied in a very natural way to give a neutrino mass hierarchy with large atmospheric and solar angles by assuming single right-handed neutrino dominance. A theoretical framework for understanding quark and lepton (including neutrino) masses and mixing angles based on SUSY, GUTs and Family symmetry is then described, and sample models which involve single right-handed neutrino dominance are discussed.