Flavor Symmetry L_mu - L_tau and quasi-degenerate Neutrinos

Abstract

Current data implies three simple forms of the neutrino mass matrix, each corresponding to the conservation of a non-standard lepton charge. While models based on L_e and L_e - L_mu - L_tau are well-known, little attention has been paid to L_mu - L_tau. A low energy mass matrix conserving L_mu - L_tau implies quasi-degenerate light neutrinos. Moreover, it is mu-tau symmetric and therefore (in contrast to L_e and L_e - L_mu - L_tau) automatically predicts maximal atmospheric neutrino mixing and zero U_{e3}. A see-saw model based on L_mu - L_tau is investigated and testable predictions for the neutrino mixing observables are given. Renormalization group running below and in between the see-saw scales is taken into account in our analysis, both numerically and analytically.

arXiv comment15 pages, 2 figures. Prepared for 5th International Conference on Nonaccelerator New Physics (NANP 05), Dubna, Russia, 20-25 Jun 2005

References in corpus (25)

• Status of global fits to neutrino oscillations
• Underlying A_4 Symmetry for the Neutrino Mass Matrix and the Quark Mixing Matrix
• Renormalization of the Neutrino Mass Operator
• Zeroes of the Neutrino Mass Matrix
• Running Neutrino Masses, Mixings and CP Phases: Analytical Results and Phenomenological Consequences
• Running Neutrino Mass Parameters in See-Saw Scenarios
• Texture Zeros and Majorana Phases of the Neutrino Mass Matrix
• A 2-3 Symmetry in Neutrino Oscillations
• Neutrino Mixing and Quark-Lepton Complementarity
• Relation between the neutrino and quark mixing angles and grand unification
• On Deviations from Bimaximal Neutrino Mixing
• Quantum corrections to neutrino masses and mixing angles
• Minimal Scenarios for Leptogenesis and CP Violation
• Quark Lepton Mass Hierarchies and the Baryon Asymmetry
• A Flavor Symmetry for quasi-degenerate Neutrinos: L_mu-L_tau
• Low-Scale See-Saw Mechanisms for Light Neutrinos
• Quasi-degenerate neutrinos from an abelian family symmetry
• Renormalisation Group Analysis of Single Right-handed Neutrino Dominance
• A Parametrization for the Neutrino Mixing Matrix
• Renormalization Effect on Large Neutrino Flavor Mixing in the Minimal Supersymmetric Standard Model
• Minimal Mass Matrices for Dirac Neutrinos
• Naturally small Dirac neutrino masses in supergravity
• Towards Complete Neutrino Mixing Matrix and CP-Violation
• Small Dirac neutrino masses in supersymmetric grand unified theories
• Yukawa Textures, Neutrino Masses and Horava-Witten M-Theory

Cited by in corpus (18)

• Nonzero U_{e3}, CP violation and leptogenesis in a see-saw type softly broken A_4 symmetric model
• Model Predictions for Neutrino Oscillation Parameters
• Neutrino Mass, Dark Matter and Anomalous Magnetic Moment of Muon in a $U(1{)}_{L_{\mu }-L_{\tau }}$ Model
• Gauged $U(1{)}_{L_{\mu }-L_{\tau }}$ model in light of muon $g-2$ anomaly, neutrino mass and dark matter phenomenology
• Gauged L_mu - L_tau and different Muon Neutrino and Anti-Neutrino Oscillations: MINOS and beyond
• Consequences of Approximate $S_3$ Symmetry of the Neutrino Mass Matrix
• Near Maximal Atmospheric Neutrino Mixing in Neutrino Mass Models with Two Texture Zeros
• Soft breaking of $L_{\mu }-L_{\tau }$ symmetry: Light neutrino spectrum and Leptogenesis
• Scaling in the Neutrino Mass Matrix, mu-tau Symmetry and the See-Saw Mechanism
• Terascale Physics Opportunities at a High Statistics, High Energy Neutrino Scattering Experiment: NuSOnG
• Large and Almost Maximal Neutrino Mixing within the Type II See-Saw Mechanism
• Formulae for flavour neutrino masses and its application to texture two zeros
• One-loop radiative seesaw dark matter and neutrinoless double beta decay with two zero flavor neutrino mass texture
• $(g-2{)}_{e,\mu }$ and strongly interacting dark matter with collider implications
• Constraints on New Physics from Long Baseline Neutrino Oscillation Experiments
• LHC sensitivity to singly-charged scalars decaying into electrons and muons
• Theta_{13}, Rare Decays and Leptonic CP Violation
• A new class of invariants in the lepton sector