μτ Symmetry, tribimaximal mixing and four zero neutrino Yukawa textures

Adhikary, Biswajit ; Ghosal, Ambar ; Roy, Probir (2009) μτ Symmetry, tribimaximal mixing and four zero neutrino Yukawa textures Jounal of High Energy Physics, 2009 (10). No pp. given. ISSN 1126-6708

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Official URL: http://iopscience.iop.org/1126-6708/2009/10/040?fr...

Related URL: http://dx.doi.org/10.1088/1126-6708/2009/10/040

Abstract

Within the type-I seesaw framework with three heavy right chiral neutrinos and in the basis where the latter and the charged leptons are mass diagonal, a near μτ symmetry in the neutrino sector is strongly suggested by the neutrino oscillation data. There is further evidence for a close to the tribimaximal mixing pattern which subsumes μτ symmetry. On the other hand, the assumption of a (maximally allowed) four zero texture in the Yukawa coupling matrix Yν in the same basis leads to a highly constrained and predictive theoretical scheme. We show that the requirement of an exact μτ symmetry, coupled with observational constraints, reduces the seventy two allowed textures in such a Yν to only four corresponding to just two different forms of the light neutrino mass matrix mν. The effect of each of these on measurable quantities can be described, apart from an overall factor of the neutrino mass scale, in terms of two real parameters and a phase angle all of which are within very constrained ranges. The additional input of a tribimaximal mixing reduces these three parameters to only one with a very nearly fixed value. Implications for both flavored and unflavored leptogenesis as well as radiative lepton flavor violating decays are discussed. We also investigate the stability of these conclusions under small deviations due to renormalization group running from a high scale where the four zero texture as well as μτ symmetry or the tribimaximal mixing pattern are imposed.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
Keywords:Beyond Standard Model; Neutrino Physics
ID Code:46562
Deposited On:05 Jul 2011 06:21
Last Modified:18 May 2016 02:24

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