Discrete family symmetry, Higgs mediators and theta_{13}

Abstract

We present a new (supersymmetric) framework for obtaining an excellent description of quark, charged lepton and neutrino masses and mixings from a Delta(6n^2) family symmetry with multiplet assignments consistent with an underlying SO(10) Grand Unification. It employs a Higgs mediator sector in place of the usual Froggatt-Nielsen messengers, with quark and lepton messengers, and provides significant improvements over existing models of this type having unsuppressed Yukawa couplings to the third generation and a simplified vacuum alignment mechanism. The neutrino mass differences are naturally less hierarchical than those of the quarks and charged leptons. Similarly the lepton mixing angles are much larger than those in the quark sector and have an approximate tri-bi-maximal (TB) mixing form for theta_{12} and theta_{23}. However the mixing angle theta_{13} is naturally much larger than in pure TB mixing and can be consistent with the value found in recent experiments. The magnitude of theta_{13} is correlated with a the predicted deviation of theta_{23} from bi-maximal mixing. The model has light familon fields that can significantly modify the associated SUSY phenomenology.

v3: accepted in JHEP

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Cited by in corpus (35)

• Neutrino Mass and Mixing with Discrete Symmetry
• Unified Models of Neutrinos, Flavour and CP Violation
• Discrete Flavour Groups, θ_13 and Lepton Flavour Violation
• Lepton Mixing Predictions from Delta(6n^2) Family Symmetry
• Towards a complete $A_4\times SU(5)$ SUSY GUT
• A Grand Delta(96) x SU(5) Flavour Model
• Tri-bimaximal-Cabibbo Mixing
• Lepton Mixing Predictions including Majorana Phases from $\Delta (6n^2)$ Flavour Symmetry and Generalised CP
• Finite Symmetry of Leptonic Mass Matrices
• θ^PMNS_13 = θ_C / \sqrt2 from GUTs
• Towards a complete $\Delta (27)\times SO(10)$ SUSY GUT
• Spontaneous CP violation in A4xSU(5) with Constrained Sequential Dominance 2
• UV completions of flavour models and large theta_{13}
• An SU(5) x A5 Golden Ratio Flavour Model
• A Unified Model of Quarks and Leptons with a Universal Texture Zero
• Discrete Symmetries and Neutrino Mass Perturbations for θ_{13}
• A natural $S_4\times SO(10)$ model of flavour
• Status of Neutrino Mass and Mixing
• Non-Abelian family symmetries as portals to dark matter
• Bilarge Neutrino Mixing and Abelian Flavor Symmetry
• $\mathbf{SO}(10)\times {\mathbf{S}}_4$ Grand Unified Theory of Flavour and Leptogenesis
• Horizontal Symmetries $\Delta (150)$ and $\Delta (600)$
• Controlled flavor violation in the MSSM from a unified $\Delta (27)$ flavor symmetry
• Leptogenesis in a $\Delta (27)\times SO(10)$ SUSY GUT
• Quasidegeneracy of Majorana Neutrinos and the Origin of Large Leptonic Mixing
• Deviation from Tri-Bimaximal Mixing and Large Reactor Mixing Angle
• A Built-in Horizontal Symmetry of $SO(10)$
• Leptogenesis in $\Delta (27)$ with a Universal Texture Zero
• An Overview of Neutrino Mixing
• Hybrid seesaw neutrino model in SUSY $SU(5)\times {\mathbb{A}}_4$
• Minimal lepton flavour structures lead to non-maximal 2-3 mixing
• Revisiting the Universal Texture Zero of Flavour: a Markov Chain Monte Carlo Analysis
• Neutrino Mixing from $\Delta (6n^2)$ Groups
• Universal Democracy Instead of Anarchy
• On the ambiguities in the tri-bimaximal mixing matrix and corresponding charged lepton corrections