Search for Active Neutrino Disappearance Using Neutral-Current Interactions in the MINOS Long-Baseline Experiment

Abstract

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P. Adamson,⁹ C. Andreopoulos,²¹ K. E. Arms,¹⁷ R. Armstrong,¹² D. J. Auty,²⁵ D. S. Ayres,¹ C. Backhouse,¹⁹ B. Baller,⁹ G. Barr,¹⁹ W. L. Barrett,³⁰ B. R. Becker,¹⁷ A. Belias,²¹ R. H. Bernstein,⁹ D. Bhattacharya,²⁰ M. Bishai,⁴ A. Blake,⁶ G. J. Bock,⁹ J. Boehm,¹⁰ D. J. Boehnlein,⁹ D. Bogert,⁹ C. Bower,¹² E. Buckley-Geer,⁹ S. Cavanaugh,¹⁰ J. D. Chapman,⁶ D. Cherdack,²⁸ S. Childress,⁹ B. C. Choudhary,⁹ J. H. Cobb,¹⁹ S. J. Coleman,³¹ A. J. Culling,⁶ J. K. de Jong,¹¹ M. Dierckxsens,⁴ M. V. Diwan,⁴ M. Dorman,^16,21 S. A. Dytman,²⁰ C. O. Escobar,⁷ J. J. Evans,^16,19 E. Falk Harris,²⁵ G. J. Feldman,¹⁰ M. V. Frohne,³ H. R. Gallagher,²⁸ A. Godley,²³ M. C. Goodman,¹ P. Gouffon,²² R. Gran,¹⁸ E. W. Grashorn,¹⁷ N. Grossman,⁹ K. Grzelak,^29,19 A. Habig,¹⁸ D. Harris,⁹ P. G. Harris,²⁵ J. Hartnell,^25,21 R. Hatcher,⁹ K. Heller,¹⁷ A. Himmel,⁵ A. Holin,¹⁶ L. Hsu,⁹ J. Hylen,⁹ G. M. Irwin,²⁴ M. Ishitsuka,¹² D. E. Jaffe,⁴ C. James,⁹ D. Jensen,⁹ T. Kafka,²⁸ S. M. S. Kasahara,¹⁷ J. J. Kim,²³ M. S. Kim,²⁰ G. Koizumi,⁹ S. Kopp,²⁷ M. Kordosky,^31,16 D. J. Koskinen,¹⁶ S. K. Kotelnikov,¹⁴ A. Kreymer,⁹ S. Kumaratunga,¹⁷ K. Lang,²⁷ J. Ling,²³ P. J. Litchfield,¹⁷ R. P. Litchfield,¹⁹ L. Loiacono,²⁷ P. Lucas,⁹ J. Ma,²⁷ W. A. Mann,²⁸ A. Marchionni,⁹ M. L. Marshak,¹⁷ J. S. Marshall,⁶ N. Mayer,¹² A. M. McGowan,^1,17 J. R. Meier,¹⁷ M. D. Messier,¹² C. J. Metelko,²¹ D. G. Michael,⁵ W. H. Miller,¹⁷ S. R. Mishra,²³ C. D. Moore,⁹ J. Morfín,⁹ L. Mualem,⁵ S. Mufson,¹² S. Murgia,²⁴ J. Musser,¹² D. Naples,²⁰ J. K. Nelson,³¹ H. B. Newman,⁵ R. J. Nichol,¹⁶ T. C. Nicholls,²¹ J. P. Ochoa-Ricoux,⁵ W. P. Oliver,²⁸ R. Ospanov,²⁷ J. Paley,¹² V. Paolone,²⁰ A. Para,⁹ T. Patzak,⁸ Ž. Pavlović,²⁷ G. Pawloski,²⁴ G. F. Pearce,²¹ C. W. Peck,⁵ D. A. Petyt,¹⁷ R. Pittam,¹⁹ R. K. Plunkett,⁹ A. Rahaman,²³ R. A. Rameika,⁹ T. M. Raufer,²¹ B. Rebel,⁹ J. Reichenbacher,¹ P. A. Rodrigues,¹⁹ C. Rosenfeld,²³ H. A. Rubin,¹¹ V. A. Ryabov,¹⁴ M. C. Sanchez,^1,10 N. Saoulidou,⁹ J. Schneps,²⁸ P. Schreiner,³ P. Shanahan,⁹ W. Smart,⁹ C. Smith,¹⁶ A. Sousa,¹⁹ B. Speakman,¹⁷ P. Stamoulis,² M. Strait,¹⁷ N. Tagg,²⁸ R. L. Talaga,¹ M. A. Tavera,²⁵ J. Thomas,¹⁶ M. A. Thomson,⁶ J. L. Thron,¹ G. Tinti,¹⁹ I. Trostin,¹³ V. A. Tsarev,¹⁴ G. Tzanakos,² J. Urheim,¹² P. Vahle,^31,16 B. Viren,⁴ D. R. Ward,⁶ M. Watabe,²⁶ A. Weber,¹⁹ R. C. Webb,²⁶ A. Wehmann,⁹ N. West,¹⁹ C. White,¹¹ S. G. Wojcicki,²⁴ D. M. Wright,¹⁵ T. Yang,²⁴ K. Zhang,⁴ and R. Zwaska⁹

(MINOS Collaboration)

¹Argonne National Laboratory, Argonne, Illinois 60439, USA
²Department of Physics, University of Athens, GR-15771 Athens, Greece
³Physics Department, Benedictine University, Lisle, Illinois 60532, USA
⁴Brookhaven National Laboratory, Upton, New York 11973, USA
⁵Lauritsen Laboratory, California Institute of Technology, Pasadena, California 91125, USA
⁶Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom
⁷Universidade Estadual de Campinas, IF-UNICAMP, CP 6165, 13083-970, Campinas, SP, Brazil
⁸APC-Université Paris 7 Denis Diderot, 10, rue Alice Domon et Léonie Duquet, F-75205 Paris Cedex 13, France
⁹Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
¹⁰Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
¹¹Physics Division, Illinois Institute of Technology, Chicago, Illinois 60616, USA
¹²Indiana University, Bloomington, Indiana 47405, USA
¹³High Energy Experimental Physics Department, ITEP, B. Cheremushkinskaya, 25, 117218 Moscow, Russia
¹⁴Nuclear Physics Department, Lebedev Physical Institute, Leninsky Prospect 53, 119991 Moscow, Russia
¹⁵Lawrence Livermore National Laboratory, Livermore, California 94550, USA
¹⁶Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
¹⁷University of Minnesota, Minneapolis, Minnesota 55455, USA
¹⁸Department of Physics, University of Minnesota-Duluth, Duluth, Minnesota 55812, USA
¹⁹Subdepartment of Particle Physics, University of Oxford, Oxford OX1 3RH, United Kingdom
²⁰Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
²¹Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom
²²Instituto de Física, Universidade de São Paulo, CP 66318, 05315-970, São Paulo, SP, Brazil
²³Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA
²⁴Department of Physics, Stanford University, Stanford, California 94305, USA
²⁵Department of Physics and Astronomy, University of Sussex, Falmer, Brighton BN1 9QH, United Kingdom
²⁶Physics Department, Texas A&M University, College Station, Texas 77843, USA
²⁷Department of Physics, University of Texas at Austin, 1 University Station C1600, Austin, Texas 78712, USA
²⁸Physics Department, Tufts University, Medford, Massachusetts 02155, USA
²⁹Department of Physics, Warsaw University, Hoa 69, PL-00-681 Warsaw, Poland
³⁰Physics Department, Western Washington University, Bellingham, Washington 98225, USA
³¹Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA

Received 16 July 2008; published 26 November 2008

Wereport the first detailed comparisons of the rates and spectraof neutral-current neutrino interactions at two widely separated locations. Adepletion in the rate at the far site would indicatemixing between _µ and a sterile particle. No anomalous depletionin the reconstructed energy spectrum is observed. Assuming oscillations occurat a single mass-squared splitting, a fit to the neutral-and charged-current energy spectra limits the fraction of _µ oscillatingto a sterile neutrino to be below 0.68 at 90%confidence level. A less stringent limit due to a possiblecontribution to the measured neutral-current event rate at the farsite from _e appearance at the current experimental limit isalso presented.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.101.221804
DOI:	10.1103/PhysRevLett.101.221804
PACS:	14.60.St; 12.15.Mm; 14.60.Pq 14.60.St Non-standard-model neutrinos, right-handed neutrinos, etc. 12.15.Mm Neutral currents 14.60.Pq Neutrino mass and mixing YEAR: 2008