Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2008-07-15
Phys.Rev.Lett.101:221804,2008
Physics
High Energy Physics
High Energy Physics - Experiment
5 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.101.221804
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.
Adamson Paul
for the MINOS Collaboration
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