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Search for the disappearance of muon antineutrinos in the NuMI neutrino beam

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arxiv 1108.1509 v2 pith:Y245A6ON submitted 2011-08-06 hep-ex

Search for the disappearance of muon antineutrinos in the NuMI neutrino beam

MINOS Collaboration: P. Adamson , D. J. Auty , D. S. Ayres , C. Backhouse , G. Barr , M. Bishai , A. Blake , G. J. Bock
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D. J. Boehnlein D. Bogert S. V. Cao S. Cavanaugh D. Cherdack S. Childress B. C. Choudhary J. A. B. Coelho S. J. Coleman L. Corwin D. Cronin-Hennessy I. Z. Danko J. K. de Jong N. E. Devenish M. V. Diwan M. Dorman C. O. Escobar J. J. Evans E. Falk G. J. Feldman M. V. Frohne H. R. Gallagher R. A. Gomes M. C. Goodman P. Gouffon N. Graf R. Gran N. Grant K. Grzelak A. Habig J. Hartnell R. Hatcher A. Himmel A. Holin C. Howcroft X. Huang J. Hylen G. M. Irwin Z. Isvan D. E. Jaffe C. James D. Jensen T. Kafka S. M. S. Kasahara G. Koizumi S. Kopp M. Kordosky A. Kreymer K. Lang G. Lefeuvre J. Ling P. J. Litchfield L. Loiacono P. Lucas W. A. Mann M. L. Marshak M. Mathis N. Mayer R. Mehdiyev J. R. Meier M. D. Messier D. G. Michael W. H. Miller S. R. Mishra J. Mitchell C. D. Moore L. Mualem S. Mufson J. Musser D. Naples J. K. Nelson H. B. Newman R. J. Nichol J. A. Nowak J. P. Ochoa-Ricoux W. P. Oliver M. Orchanian R. Pahlka J. Paley R. B. Patterson G. Pawloski G. F. Pearce S. Phan-Budd R. K. Plunkett X. Qiu J. Ratchford B. Rebel C. Rosenfeld H. A. Rubin M. C. Sanchez J. Schneps A. Schreckenberger P. Schreiner R. Sharma A. Sousa M. Strait N. Tagg R. L. Talaga M. A. Tavera J. Thomas M. A. Thomson G. Tinti R. Toner D. Torretta G. Tzanakos J. Urheim P. Vahle B. Viren J. J. Walding A. Weber R. C. Webb C. White L. Whitehead S. G. Wojcicki T. Yang R. Zwaska
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keywords antineutrinomuonbeamdetectordm2bareventsneutrinonumi
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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) ^{+10.2}_{-8.9}(syst) events under the assumption |dm2bar|=2.32x10^-3 eV^2, snthetabar=1.0. Assuming no oscillations occur at the Near Detector baseline, a fit to the two-flavor oscillation approximation constrains |dm2bar|<3.37x10^-3 eV^2 at the 90% confidence level with snthetabar=1.0.

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