S_3 Flavor Symmetry and Leptogenesis

Abstract

We consider leptogenesis in a minimal S_3 extension of the standard model with an additional Z_2 symmetry in the leptonic sector. It is found that the CP phase appearing in the neutrino mixing is the same as that for the CP asymmetries responsible for leptogenesis. Because of the discrete S_3 x Z_2 flavor symmetries, the CP asymmetries are strongly suppressed. We therefore assume that the resonant enhancement of the CP asymmetries takes place to obtain a realistic size of baryon number asymmetry in theuniverse. Three degenerate right-handed neutrino masses of O(10) TeV are theoretically expected in this model.

25 pages, 3 figures

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• Symmetry realization of texture zeros
• Lepton mixing angle ${\theta }_{13}=0$ with a horizontal symmetry $D_4$
• Relating Leptogenesis to Low Energy Flavor Violating Observables in Models with Spontaneous CP Violation
• Naturally Degenerate Right Handed Neutrinos

Cited by in corpus (20)

• The Unique Horizontal Symmetry of Leptons
• Symmetry of Lepton Mixing
• Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis
• Quark sector of S3 models: classification and comparison with experimental data
• An A4 model for lepton masses and mixings
• Discrete Flavor Symmetry, Dynamical Mass Textures, and Grand Unification
• Minimal Mass Matrices for Dirac Neutrinos
• 'Mu-Tau' symmetry, tribimaximal mixing and four zero neutrino Yukawa textures
• Lepton Masses in a Minimal Model with Triplet Higgs Bosons and $S_3$ Flavor Symmetry
• Masses, mixing angles and phases of general Majorana neutrino mass matrix
• Neutrino masses and mixings with an S3 family permutation symmetry
• Fermion masses in E_6 grand unification with family permutation symmetries
• Leptogenesis in a model with Friedberg-Lee symmetry
• Symmetryless Dark Matter
• Neutrino mixing and Leptogenesis with modular $S_3$ symmetry in the framework of type III seesaw
• Broken $S_{3\mathrm{L}}^{}\times S_{3\mathrm{R}}^{}$ Flavor Symmetry and Leptonic CP Violation
• Scalar triplet leptogenesis in the presence of right-handed neutrinos with S3 symmetry
• Spontaneous symmetry breaking in three-Higgs-doublet $S_3$-symmetric models
• Leptogenesis with Friedberg-Lee Symmetry
• Spontaneous CP breaking in $S_3$ flavored Higgs sector with soft-breaking terms