Active to Sterile Neutrino Mixing Limits from Neutral-Current Interactions in MINOS
Physical Review Letters
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 x 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 nu(mu) that may transition to nu(s) is found to be less than 22% at the 90% C.L.
Ayres, D. S.; Goodman, M. C.; Huang, X.; Coleman, S. J.; Kordosky, M.; Nelson, J. K.; Vahle, P.; and Walding, J. J., Active to Sterile Neutrino Mixing Limits from Neutral-Current Interactions in MINOS (2011). Physical Review Letters, 107(1).