Unitary Parametrization of Perturbations to Tribimaximal Neutrino Mixing

Pakvasa, Sandip; Rodejohann, Werner; Weiler, Thomas

doi:10.1103/PhysRevLett.100.111801

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Unitary Parametrization of Perturbations to Tribimaximal Neutrino Mixing

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Rodejohann, Werner
Werner Rodejohann - ERC Starting Grant, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

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Citation

Pakvasa, S., Rodejohann, W., & Weiler, T. (2008). Unitary Parametrization of Perturbations to Tribimaximal Neutrino Mixing. Physical Review Letters, 100(11): 111801, pp. 1-4. doi:10.1103/PhysRevLett.100.111801.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-7B4A-E

Abstract

Current experimental data on neutrino mixing are very well described by TriBiMaximal mixing. Accordingly, any phenomenological parametrization of the MNSP matrix must build upon TriBiMaximal mixing. We propose one particularly natural parametrization, which we call "TriMinimal". The three small deviations of the PDG angles from their TriBiMaximal values, and the PDG phase, parametrize the TriMinimal mixing matrix. As an important example of the utility of this new parametrization, we present the simple resulting expressions for the flavor-mixing probabilities of atmospheric and astrophysical neutrinos. As no foreseeable experiment will be sensitive to more than second order in the small parameters, we expand these flavor probabilities to second order.