Hybrid textures in minimal seesaw mass matrices

Abstract

In the context of minimal seesaw framework, we study the implications of Dirac and Majorana mass matrices in which two rigid properties coexist, namely, equalities among mass matrix elements and texture zeros. In the first part of the study, we discuss general possibilities of the Dirac and Majorana mass matrices for neutrinos with such hybrid structures. We then classify the mass matrices into realistic textures which are compatible with global neutrino oscillation data and unrealistic ones which do not comply with the data. Among the large number of general possibilities, we find that only 6 patterns are consistent with the observations at the level of the most minimal number of free parameters. These solutions have only 2 adjustable parameters, so that all the mixing angles can be described in terms of the two mass differences or pure numbers. We analyze these textures in detail and discuss their impacts for future neutrino experiments and for leptogenesis.

25 pages, 2 figures; (ver. 2) A significant revision is made for easy reading, and analyses on CP violation are added

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Cited by in corpus (19)

• Phenomenological Analysis of Hybrid Textures of Neutrinos
• The minimal seesaw and leptogenesis models
• Hybrid Textures of Majorana Neutrino Mass Matrix and Current Experimental Tests
• Neutrino Mass Matrices with Two Equalities Between the Elements or Cofactors
• Broken Scaling Neutrino Mass Matrix and Leptogenesis based on A${}_4$ Modular invariance
• Phenomenological study of extended seesaw model for light sterile neutrino
• Minimal Textures in Seesaw Mass Matrices and their low and high Energy Phenomenology
• Towards the minimal seesaw model via CP violation of neutrinos
• Two simple textures of the magic neutrino mass matrix
• Relating large $U_{e3}$ to the ratio of neutrino mass-squared differences
• Two Zero Mass Matrices and Sterile Neutrinos
• Neutrino CP violation and sign of baryon asymmetry in the minimal seesaw model
• Hybrid Textures of Neutrino Mass Matrix under the Lamppost of Latest Neutrino and Cosmology Data
• Minimal Neutrino Texture with Neutrino Mass Ratio and Cabibbo Angle
• Highly predictive and testable $A_4$ flavor model within type-I and II seesaw framework and associated phenomenology
• Scotogenesis in Hybrid Textures of Neutrino Mass Matrix and Neutrinoless Double Beta Decay
• Singlet Fermion Assisted Dominant Seesaw with Lepton Flavor and Number Violations and Leptogenesis
• Particular textures of the minimal seesaw model
• Obtaining nonvanishing ${\theta }_{13}$ with constrained neutrino Yukawa matrix and implications for flavor model buildings