Active to Sterile Neutrino Mixing Limits from Neutral-Current Interactions in MINOS

Creators: Adamson, P.; Himmel, A.; Mualem, L.; Newman, H. B.; Orchanian, M.; Patterson, R. B.; MINOS Collaboration

Abstract

Results are reported from a search for active to sterile neutrino oscillations in the MINOS long-baseline experiment, based on the observation of neutral-current neutrino interactions, from an exposure to the NuMI neutrino beam of 7.07×10^(20) protons on target. A total of 802 neutral-current event candidates is observed in the Far Detector, compared to an expected number of 754±28(stat)±37(syst) for oscillations among three active flavors. The fraction f_s of disappearing ν_μ that may transition to ν_s is found to be less than 22% at the 90% C.L.

Additional Information

© 2011 American Physical Society. Received 19 April 2011; published 30 June 2011. This work was supported by the U.S. DOE; the UK STFC; the U.S. NSF; the State and University of Minnesota; the University of Athens, Greece; and Brazil's FAPESP, CNPq, and CAPES. We gratefully acknowledge the Minnesota DNR, the crew of the Soudan Underground Laboratory, and the personnel of Fermilab for their contribution to this effort.

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