A4xSU(5) SUSY GUT of Flavour with Trimaximal Neutrino Mixing

Abstract

Recent T2K, MINOS and Double CHOOZ results, together with global fits of mixing parameters, indicate a sizeable reactor angle theta13 ~ 8 deg which, if confirmed, would rule out tri-bimaximal (TB) lepton mixing. Recently two of us studied the vacuum alignment of the Altarelli-Feruglio A4 family symmetry model including additional flavons in the 1' and 1" representations, leading to so-called "trimaximal" neutrino mixing and allowing a potentially large reactor angle. Here we show how such a model may arise from a Supersymmetric (SUSY) Grand Unified Theory (GUT) based on SU(5), leading to sum rule bounds |s| < thetaC/3, |a| < (r + thetaC/3)|cos delta|/2, where s,a,r parameterise the solar, atmospheric and reactor angle deviations from their TB mixing values, delta is the CP violating oscillation phase, and thetaC is the Cabibbo angle.

arXiv comment19 pages, 4 tables

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Cited by in corpus (48)

• Neutrino Mass and Mixing with Discrete Symmetry
• Neutrino Mass and Mixing: from Theory to Experiment
• Unified Models of Neutrinos, Flavour and CP Violation
• Spontaneous CP violation from vacuum alignment in $S_4$ models of leptons
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• Tri-bimaximal-Cabibbo Mixing
• Finite Symmetry of Leptonic Mass Matrices
• θ^PMNS_13 = θ_C / \sqrt2 from GUTs
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• Simple two Parameter Description of Lepton Mixing
• A Minimal Model of Neutrino Flavor
• Spontaneous CP violation in A4xSU(5) with Constrained Sequential Dominance 2
• An SU(5) x A5 Golden Ratio Flavour Model
• Discrete family symmetry, Higgs mediators and theta_{13}
• SUSY S4 x SU(5) revisited
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• Large θ_13 in a SUSY SU(5)xT' Model
• Compatibility of theta13 and the Type I Seesaw Model with A4 Symmetry
• Muon g-2 and Dark Matter suggest Non-Universal Gaugino Masses: $\mathbf{SU}(5)\times {\mathbf{A}}_4$ case study at the LHC
• An $S_4\times SU(5)$ SUSY GUT of flavour in 6d
• Radiative Seesaw-type Mechanism of Fermion Masses and Non-trivial Quark Mixing
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