Nonunitary deviation from the tribimaximal lepton mixing and its implications on neutrino oscillations
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
We propose a new pattern of the neutrino mixing matrix which can be parametrized as the product of an arbitrary Hermitian matrix and the well-known tribimaximal mixing matrix. In this scenario, nontrivial values of the smallest neutrino mixing angle {theta}{sub 13} and the CP-violating phases entirely arise from the nonunitary corrections. We present a complete set of series expansion formulas for neutrino oscillation probabilities both in vacuum and in matter of constant density. We do a numerical analysis to show the nonunitary effects on neutrino oscillations. The possibility of determining small nonunitary perturbations and CP-violating phases is discussed by measuring neutrino oscillation probabilities and constructing 'deformed unitarity triangles'. Some brief comments on the nonunitary neutrino mixing matrix in the type-II seesaw models are also given.
- OSTI ID:
- 21250284
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 1; Other Information: DOI: 10.1103/PhysRevD.78.016006; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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