Maximal Neutrino Mixing from Discrete Symmetry in Extra Dimensions
Abstract
Description
I review the construction of a model for lepton masses based on the flavour symmetry group A4 x U(1) reproducing the so-called tri-bimaximal lepton mixing scheme, in eccelent agreement with current data. The model predicts a neutrino spectrum of normal hierarchy type, not far from degenerate. A testable relation between neutrino masses is obtained. I shortly discuss also general requirements for models based on spontaneously broken flavour symmetries, in order to get a maximal atmospheric mixing angle.
3 pages, 1 figure, contribution to proc. of the Int. Europhysics Conf. on High Energy Physics (HEP2005) July 21th-27th 2005, Lisboa, Portugal
3 pages, 1 figure, contribution to proc. of the Int. Europhysics Conf. on High Energy Physics (HEP2005) July 21th-27th 2005, Lisboa, Portugal