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- W3099696893 abstract "We review the problem of neutrino masses and mixings in the context of Grand Unified Theories. After a brief summary of the present experimental status of neutrino physics, we describe how the see-saw mechanism can automatically account for the large atmospheric mixing angle. We provide two specific examples where this possibility is realized by means of a flavour symmetry. We then review in some detail the various severe problems which plague minimal GUT models (like the doublet-triplet splitting and proton-decay) and which force to investigate the possibility of constructing more elaborate but realistic models. We then show an example of a quasi-realistic SUSY SU(5) model which, by exploiting the crucial presence of an abelian flavour symmetry, does not require any fine-tuning and predicts a satisfactory phenomenology with respect to coupling unification, fermion masses and mixings and bounds from proton decay." @default.
- W3099696893 created "2020-11-23" @default.
- W3099696893 creator A5050403253 @default.
- W3099696893 date "2001-12-30" @default.
- W3099696893 modified "2023-09-26" @default.
- W3099696893 title "THE PROBLEM OF NEUTRINO MASSES IN EXTENSIONS OF THE STANDARD MODEL" @default.
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- W3099696893 doi "https://doi.org/10.1142/s0217751x01005456" @default.
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