Abstract
Recent data in the neutrino sector point towards a relatively large value of the reactor angle, incompatible with a vanishing θ 13 at about 3σ. In order to explain such a result, we propose a SUSY model based on a broken U(1) F flavour symmetry with charge L e − L μ − L τ for lepton doublets and arbitrary charge for the right-handed SU(2) singlet fields, where large deviations from the symmetric limit θ 12 = π/4, tan θ 23 ~ \( \mathcal{O} \)(1) and θ 13 = 0 mainly come from the charged lepton sector. We show that a description of all neutrino data is possible if the charged lepton mass matrix has a special pattern of complex matrix elements.
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Meloni, D. Large θ 13 from a model with broken L e -L μ -L τ symmetry. J. High Energ. Phys. 2012, 90 (2012). https://doi.org/10.1007/JHEP02(2012)090
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DOI: https://doi.org/10.1007/JHEP02(2012)090