An eigenvector based approach to neutrino mixing

Abstract

We propose a model-independent analysis of the neutrino mass matrix through an expansion in terms of the eigenvectors defining the lepton mixing matrix, which we show can be parametrized as small perturbations of the tribimaximal mixing eigenvectors. This approach proves to be powerful and convenient for some aspects of lepton mixing, in particular when studying the sensitivity of the mass matrix elements to departures from their tribimaximal form. In terms of the eigenvector decomposition, the neutrino mass matrix can be understood as originating from a tribimaximal dominant structure with small departures determined by data. By implementing this approach to cases when the neutrino masses originate from different mechanisms, we show that the experimentally observed structure arises very naturally. We thus claim that the observed deviations from the tribimaximal mixing pattern might be interpreted as a possible hint of a ``hybrid'' nature of the neutrino mass matrix.

4 pages, 1 figure

References in corpus (7)

• Observation of electron-antineutrino disappearance at Daya Bay
• Neutrino Mass and Mixing with Discrete Symmetry
• Global analysis of neutrino masses, mixings and phases: entering the era of leptonic CP violation searches
• Global status of neutrino oscillation parameters after Neutrino-2012
• Global fit to three neutrino mixing: critical look at present precision
• Parametrizing the lepton mixing matrix in terms of deviations from tri-bimaximal mixing
• TriMinimal Parametrization of the Neutrino Mixing Matrix

Cited by in corpus (21)

• Deviations from Tri-Bimaximal Neutrino Mixing Using Type II Seesaw
• Sub-dominant Type II Seesaw as an Origin of Non-zero ${\theta }_{13}$ in SO(10) model with TeV scale $Z^{\prime }$ Gauge Boson
• Bottom-Up Discrete Symmetries for Cabibbo Mixing
• A4-based see-saw model for realistic neutrino masses and mixing
• Neutrino Mixing With Non-Zero ${\theta }_{13}$ In Zee-Babu Model
• Perturbations to $\mu -\tau$ Symmetry, Leptogenesis and Lepton Flavour Violation with Type II Seesaw
• Scotogenic S3 symmetric generation of realistic neutrino mixing
• Predicting Leptonic CP phase by considering deviations in charged lepton and neutrino sectors
• Type II Seesaw Origin of Non-zero ${\theta }_{13},{\delta }_{CP}$ and Leptogenesis
• Smallness of θ_{13} and the size of the Solar Mass Splitting: Are they related?
• Effective alignments as building blocks of flavour models
• Type I+III Seesaw Mechanism and CP Violation for Leptogenesis
• Effective alignments and the landscape of $S_4$ flavour models
• Non-Zero ${\theta }_{13}$ and ${\delta }_{CP}$ in a Neutrino Mass Model with $A_4$ Symmetry
• Connecting Leptonic CP Violation, Lightest Neutrino Mass and Baryon Asymmetry Through Type II Seesaw
• Relating small neutrino masses and mixing
• Are the small neutrino oscillation parameters all related?
• Ameliorating the popular lepton mixings with A4 symmetry: A see-saw model for realistic neutrino masses and mixing
• Hybrid seesaw neutrino model in SUSY $SU(5)\times {\mathbb{A}}_4$
• Effects on sinθ_{12} from perturbation of the neutrino mixing matrix with the partially degenerated neutrino masses
• The special Two zeros texture based on $A_4$ symmetry and perturbation method