Large Neutrino Mixing in Grand Unified Theories

Details Large Neutrino Mixing in Grand Unified Theories Large Neutrino Mixing in Grand Unified Theories

2001-05-18

arxiv.org/abs/hep-ph/0105191v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex, 4 pages, talk given at the Cairo International Conference on High Energy Physics, Cairo, Egypt, 9-14 January 2001 and a

Scientific paper

A non-minimal, semi-realistic version of supersymmetric SU(5) grand unified theory is discussed. The solution of the doublet-triplet splitting problem leads to a better agreement between the predicted and observed values of the low-energy strong coupling constant and to a prolongation of the proton lifetime. A U(1) flavor symmetry allows to accommodate a realistic mass spectrum in the charged and in the neutral fermion sectors and protects doublet-triplet splitting and proton decay from dangerous radiative corrections or non-renormalizable operators.

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