Nearly Tri-Bimaximal Neutrino Mixing and CP Violation
نویسنده
چکیده
We point out two simple but instructive possibilities to modify the tri-bimaximal neutrino mixing ansatz, such that leptonic CP violation can naturally be incorporated into the resultant scenarios of nearly tri-bimaximal flavor mixing. The consequences of two new ansätze on solar, atmospheric and reactor neutrino oscillations are analyzed. We also discuss an interesting approach to construct lepton mass matrices under permutation symmetry, from which one may derive another nearly tri-bimaximal neutrino mixing scenario with no intrinsic CP violation in neutrino oscillations. ∗Electronic address: [email protected] 1
منابع مشابه
Nearly Tri-bimaximal Neutrino Mixing and CP Violation from μ-τ Symmetry Breaking
Assuming the Majorana nature of massive neutrinos, we generalize the Friedberg-Lee neutrino mass model to include CP violation in the neutrino mass matrix Mν . We show that a favorable neutrino mixing pattern (with θ12 ≈ 35.3, θ23 = 45, θ13 6= 0 and δ = 90) can naturally be derived from Mν , if it has an approximate or softly-broken μ-τ symmetry. We point out a different way to obtain the nearl...
متن کاملCharged Lepton Corrections to Neutrino Mixing Angles and CP Phases Revisited
We re-analyze charged lepton corrections to neutrino mixing angles and CP phases, carefully including CP phases from the charged lepton sector. We present simple analytical formulae for including the charged lepton corrections and derive compact new results for small neutrino and charged lepton mixings θ 13 and θ e 13. We find a generic relation θ12 + 1 √ 2 θ e 12 cos(δ−π) ≈ θ 12, which relates...
متن کاملLepton Flavour Violation in the Constrained MSSM with Constrained Sequential Dominance
We consider charged Lepton Flavour Violation (LFV) in the Constrained Minimal Supersymmetric Standard Model, extended to include the see-saw mechanism with Constrained Sequential Dominance (CSD), where CSD provides a natural see-saw explanation of tri-bimaximal neutrino mixing. When charged lepton corrections to tri-bimaximal neutrino mixing are included, we discover characteristic correlations...
متن کاملSymmetries and Generalisations of Tri-Bimaximal Neutrino Mixing
Tri-bimaximal mixing is a specific lepton mixing ansatz, which has been shown to account very successfully for the established neutrino oscillation data. Working in a particular basis (the ‘circulant basis’), we identify three independent symmetries of tri-bimaximal mixing, which we exploit to set the tri-bimaximal hypothesis in context, alongside some simple, phenomenologically interesting CP ...
متن کاملGeneralized Tri-bimaximal Neutrino Mixing and Its Sensitivity to Radiative Corrections
We argue that the tri-bimaximal neutrino mixing pattern V0 or its generalized form V ′ 0 , which includes two arbitrary Majorana phases of CP violation, may result from an underlying flavor symmetry at a superhigh energy scale close to the seesaw scale (∼ 10 GeV). Taking the working assumption that three neutrino masses are nearly degenerate, we calculate radiative corrections to V0 and V ′ 0 i...
متن کامل