Revising Neutrino Oscillation Parameter Space With Direct Flavor-Changing Interactions

Abstract

We formulate direct, neutrino flavor-changing interactions in a framework that fits smoothly with the parameterization of two-and three-state mixing of massive neutrino states. We show that even small direct interaction strengths could have important consequences for the interpretation of currently running and proposed oscillation experiments. The oscillation amplitude and the borders of the allowed regions in two-and three-flavor mixing parameter space can be sensitieve to the presence of direct interactions when the transition probability is small. We use extensively the high sensitivity of the NOMAD experiment to illustrate potentially large effects from small, direct flavor violation. In the purely leptonic sector, we find that the clean muon neutrino and electron neutrino beams from a muon collider could provide the sharpest tests of direct flavor violation.

16 pages, 10 figures

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• Signals of R-parity violating supersymmetry in neutrino scattering at muon storage rings
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• Non-standard neutrino interactions in K^{+}\toπ^{+}ν\barν and D^{+}\toπ^{+}ν\barν decays
• CP-Violating and Charged Current Neutrino Non-standard Interactions in CE$\nu$NS
• Short Baseline Reactor Antineutrino-Electron Scattering Experiments and Non-Standard Neutrino Interactions at Source and Detector
• Improving LMA predictions with non-standard interactions: neutrino decay in solar matter?
• Intrinsic flavor violation for massive neutrinos
• New Physics from NSIs in charm Decays
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• New Physics Through Rare Decays Of Mesons