Guido Altarelli
Published 2007-05-07Version 1
We present some recent developments on model building for neutrino masses and mixings. In particular, we review tri-bimaximal neutrino mixing derived from discrete groups, notably A4. We discuss the problems encountered with extending the symmetry to the quark sector and with Grand Unification.
Comments: Talk presented at the XII International Workshop on Neutrino Telescopes, March 6-9, 2007, Venice, Italy. 23 pages, 2 figures
Neutrino Masses and Grand Unification
Neutrinos, Grand Unification and Leptogenesis
A Complete Theory of Grand Unification in Five Dimensions
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