Can radiative magnification of mixing angles occur for two-zero neutrino mass matrix textures?

Abstract

Neutrino Majorana masses and mixings can be generated from a dimension-5 operator within the standard model particle content. After a review of the mechanism of radiative enhancement of the mixing angle in a two-neutrino case, we consider three-flavour mass matrices of two-zero texture generated from such an operator and investigate the possibility of implementing the mechanism here. We observe that radiative magnification of only the solar angle is consistent with oscillation data on masses and mixings, and that too for nearly degenerate neutrinos, with two of them having opposite CP parities, while for hierarchical masses the mechanism does not work. In supersymmetry or in an extra-dimensional scenario the above features are qualitatively unchanged.

15 pages, latex, no figures; v2: discussions on inverted mass hierarchy scenario further clarified; to appear in Phys.Rev.D

References in corpus (2)

• Three-flavor solar neutrino oscillations with terrestrial neutrino constraints
• Radiative Generation of the LMA Solution from Small Solar Neutrino Mixing at the GUT Scale

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• Flavor structures of charged fermions and massive neutrinos
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• Running Neutrino Masses, Leptonic Mixing Angles and CP-Violating Phases: From $M_{\mathrm{Z}}$ to ${\Lambda }_{\mathrm{GUT}}$
• Fine-tuning and naturalness issues in the two-zero neutrino mass textures
• Flavor mixings and textures of the fermion mass matrices
• Quark lepton complementarity and renormalization group effects
• Texture 4 zero Fritzsch-like lepton mass matrices
• Minimal Mass Matrices for Dirac Neutrinos
• Quark-lepton complementarity with quasidegenerate Majorana neutrinos
• Radiatively broken symmetries of nonhierarchical neutrinos
• Minimal Seesaw Textures with Two Heavy Neutrinos
• Texture specific mass matrices with Dirac neutrinos and their implications
• Neutrino Mixings and Leptonic CP Violation from CKM Matrix and Majorana Phases
• Possible textures of the fermion mass matrices
• Radiative corrections to neutrino mass matrix in the Standard Model and beyond
• Large mixing angles for neutrinos from infrared fixed points
• Texture Zeros for Dirac Neutrinos and Current Experimental Tests
• Exploring the parameter space of texture 4 zero quark mass matrices
• Majorana neutrino mass matrices with three texture zeros and the sterile neutrino
• Low scale gravity as the source of neutrino masses?
• Investigating non-Fritzsch like texture specific quark mass matrices
• Investigating texture six zero lepton mass matrices
• Revisiting the two-zero texture Majorana neutrino mass matrix