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arXiv · 0807.2424

Search for active neutrino disappearance using neutral-current interactions in the MINOS long-baseline experiment

P. Adamson
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Abstract

We report the first detailed comparisons of the rates and spectra of neutral-current neutrino interactions at two widely separated locations. A depletion in the rate at the far site would indicate mixing between muon neutirnos and a sterile particle. No anomalous depletion in the reconstructed energy spectrum is observed. Assuming oscillations occur at a single mass-squared splitting, a fit to the neutral- and charged-current energy spectra limits the fraction of muon neutrino oscillating to a sterile neutrino to be below 0.68 at 90% confidence level. A less stringent limit due to a possible contribution to the measured neutral-current event rate at the far site from electron neutrino appearance at the current experimental limit is also presented.

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P. Adamson. 2008-07-15. Search for active neutrino disappearance using neutral-current interactions in the MINOS long-baseline experiment. https://doi.org/10.1103/physrevlett.101.221804

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