Non-unitary deviation from the tri-bimaximal lepton mixing and its implications on neutrino oscillations

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dc.creatorLuo, Shu
dc.date2008-04-30
dc.date2008-07-05
dc.date.accessioned2026-07-07T11:50:26Z
dc.date.available2026-07-07T11:50:26Z
dc.descriptionWe 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 tri-bimaximal mixing matrix. In this scenario, nontrivial values of the smallest neutrino mixing angle θ_13 and the CP-violating phases entirely arise from the non-unitary 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 non-unitary effects on neutrino oscillations. The possibility of determining small non-unitary perturbations and CP-violating phases is discussed by measuring neutrino oscillation probabilities and constructing "deformed unitarity triangles". Some brief comments on the non-unitary neutrino mixing matrix in the type-II seesaw models are also given.
dc.description30 pages, 4 PS figures. More discussions added. Accepted for publication in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0804.4897
dc.identifierhttp://arxiv.org/abs/0804.4897
dc.identifierPhys.Rev.D78:016006,2008
dc.identifierdoi:10.1103/PhysRevD.78.016006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203559
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNon-unitary deviation from the tri-bimaximal lepton mixing and its implications on neutrino oscillations
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