Bimaximal mixing and large theta13 in a SUSY SU(5) model based on S4

Abstract

The recent analyses of the world neutrino data, including the T2K and MINOS results, point toward a statistically significant deviation of theta13 from zero. In this paper we present a SUSY SU(5) model based on the discrete S4 group which predicts a large theta13 of order lambdaC, lambdaC being the Cabibbo angle. The other mixing angles in the neutrino sector are all compatible with current experimental data. In the quark sector, the entries of the CKM mixing matrix as well as the mass hierarchies in both up and down quark sectors are well reproduced and only a small enhancement is needed to reproduce lambdaC.

minor changes to match the published version in JHEP. arXiv admin note: substantial text overlap with arXiv:0802.0090

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