Search for the disappearance of muon antineutrinos in the NuMI neutrino beam
Physical Review D
We report constraints on antineutrino oscillation parameters that were obtained by using the two MINOS detectors to measure the 7% muon antineutrino component of the NuMI neutrino beam. In the Far Detector, we select 130 events in the charged-current muon antineutrino sample, compared to a prediction of 136.4 +/- 11.7(stat)(-8.9)(+10.2)(syst) events under the assumption vertical bar Delta(m) over bar (2)vertical bar = 2.32 x 10(-3) eV(2), sin(2)(2 (theta) over bar = 1.0. Assuming no oscillations occur at the Near Detector baseline, a fit to the two-flavor oscillation approximation constrains vertical bar Delta m(2)vertical bar < 3.37 x 10(-3) eV(2) at the 90% confidence level with sin(2)(2 < (theta)over bar > ) = 1.0.
Ayres, D. S.; Goodman, M. C.; Huang, X.; Coleman, S. J.; Kordosky, M.; Mathis, M.; Nelson, J. K.; Vahle, P.; and Walding, J. J., Search for the disappearance of muon antineutrinos in the NuMI neutrino beam (2011). Physical Review D, 84(7).