Revisiting Flavor Model and Leptogenesis

Abstract

We revisit a supersymmetric flavor model based on the symmetries $SU(2{)}_L\times A_4\times Z_3\times U(1{)}_R$, which extends the original Altarelli and Feruglio construction by introducing flavon and driving superfields responsible for the spontaneous breaking of the flavor symmetry in order to obtain non-zero reactor angle. The vacuum alignments of flavon fields are achieved through the minimization of the scalar potential derived from the superpotential. This setup leads to specific mass matrices for the charged leptons and neutrinos that are consistent with current experimental data, including the measured values of the lepton mixing angles and neutrino mass squared differences. We investigate whether the model can simultaneously accommodate successful thermal leptogenesis. In particular, we analyze the CP asymmetry generated in the decay of heavy Majorana neutrinos, the resulting lepton asymmetry, and its conversion to the baryon asymmetry through the electroweak sphalerons. However the CP asymmetry is zero, since the Dirac neutrino mass matrix is simple texture in the leading order for our model. Then we consider the next-to-leading order in Yukawa interactions of the Dirac neutrinos. Therefore, we can realize the baryon asymmetry of the universe at the present universe. By numerically scanning the parameter space, we identify the regions consistent with both neutrino oscillation data and the observed baryon asymmetry. In the specific case such that one of the couplings for the right-handed Majorana neutrinos is real parameter, the predicted lightest neutrino mass is at least $5$ meV and $15$ meV for the normal and inverted neutrino mass hierarchies, respectively. In addition, the range of the Majorana phases may be tested in future experiments.

16 pages, 7 figures, some discussions are added, reference is added

References in corpus (43)

• Observation of electron-antineutrino disappearance at Daya Bay
• Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment
• Tri-Bimaximal Mixing and the Neutrino Oscillation Data
• Discrete Flavor Symmetries and Models of Neutrino Mixing
• Non-Abelian Discrete Symmetries in Particle Physics
• Towards a complete theory of thermal leptogenesis in the SM and MSSM
• Neutrino Mass and Mixing with Discrete Symmetry
• CP violating decays in leptogenesis scenarios
• Tri-Bimaximal Neutrino Mixing, A4 and the Modular Symmetry
• Symmetries and Generalisations of Tri-Bimaximal Neutrino Mixing
• Tri-Bimaximal Neutrino Mixing from Discrete Symmetry in Extra Dimensions
• Nearly Tri-Bimaximal Neutrino Mixing and CP Violation
• Neutrino Mass and Mixing: from Theory to Experiment
• NuFit-6.0: Updated global analysis of three-flavor neutrino oscillations
• Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen
• Possible Alternatives to Tri-bimaximal Mixing
• Leptogenesis and Low Energy CP Violation in Neutrino Physics
• CP violation in neutrino oscillation and leptogenesis
• Parametrizing the lepton mixing matrix in terms of deviations from tri-bimaximal mixing
• Breaking Tri-bimaximal Mixing and Large ${\theta }_{13}$
• Trimaximal neutrino mixing from vacuum alignment in A4 and S4 models
• Deviation from tri-bimaximal neutrino mixing in A4 flavor symmetry
• Tri-bimaximal Neutrino Mixing and Flavor-dependent Resonant Leptogenesis
• Tri-bimaximal-Cabibbo Mixing
• The A4 flavor symmetry and neutrino phenomenology
• A4 models of tri-bimaximal-reactor mixing
• Nonzero U_{e3}, CP violation and leptogenesis in a see-saw type softly broken A_4 symmetric model
• Large neutrino mixing angle θ_{13}^{MNS} and quark-lepton mass ratios in unified flavour models
• Neutrino masses and mixing from S4 flavor twisting
• Deviations from tribimaximal mixing due to the vacuum expectation value misalignment in A_4 models
• Non-zero ${\theta }_{13}$ and CP violation in a model with $A_4$ flavor symmetry
• Large U_{e3} and Tri-bimaximal Mixing
• New Simple A_4 Neutrino Model for Nonzero θ_{13} and Large δ_{CP}
• Simple two Parameter Description of Lepton Mixing
• Tri-Bimaximal lepton mixing with A4 semidirect product Z2 x Z2 x Z2
• SUSY S4 x SU(5) revisited
• Modelling tri-bimaximal neutrino mixing
• Constraining {\it CP} violation in a softly broken $A_4$ symmetric Model
• Deviation from tri-bimaximal mixing and flavor symmetry breaking in a seesaw type A4 model
• Minimal Neutrino Texture with Neutrino Mass Ratio and Cabibbo Angle
• Mass Limit for Light Flavon with Residual $Z_3$ Symmetry
• $A_4\times U(1{)}_{PQ}$ Model for the Lepton Flavor Structure and the Strong $CP$ Problem
• Light flavon signals at electron - photon colliders