Probing non-unitary mixing and CP-violation at a Neutrino Factory

Abstract

A low energy non-unitary leptonic mixing matrix is a generic feature of many extensions of the Standard Model. In such a case, the task of future precision neutrino oscillation experiments is more ambitious than measuring the three mixing angles and the leptonic (Dirac) CP-phase, i.e., the accessible parameters of a unitary leptonic mixing matrix. A non-unitary mixing matrix has 13 parameters that affect neutrino oscillations, out of which four are CP-violating. In the scheme of Minimal Unitarity Violation (MUV) we analyse the potential of a Neutrino Factory for determining or constraining the parameters of the non-unitary leptonic mixing matrix, thereby testing the origin of CP-violation in the lepton sector.

21 pages, 8 eps figures, REVTeX4

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Cited by in corpus (5)

• General bounds on non-standard neutrino interactions
• Radiative Inverse Seesaw: Verifiable New Mechanism of Neutrino Mass
• Low-energy limits on heavy Majorana neutrino masses from the neutrinoless double-beta decay and non-unitary neutrino mixing
• Friedberg-Lee symmetry and tri-bimaximal neutrino mixing in the inverse seesaw mechanism
• Unitarity violation in sequential neutrino mixing in a model of extra dimensions