APS » Phys. Rev. D » Volume 77 » Issue 7

P. Adamson,^9,18 C. Andreopoulos,²³ K. E. Arms,¹⁹ R. Armstrong,¹² D. J. Auty,²⁷ S. Avvakumov,²⁶ D. S. Ayres,¹ B. Baller,⁹ B. Barish,⁵ P. D. Barnes, Jr.,¹⁷ G. Barr,²¹ W. L. Barrett,³¹ E. Beall,^1,19 B. R. Becker,¹⁹ A. Belias,²³ R. H. Bernstein,⁹ D. Bhattacharya,²² M. Bishai,⁴ A. Blake,⁶ B. Bock,²⁰ G. J. Bock,⁹ J. Boehm,¹⁰ D. J. Boehnlein,⁹ D. Bogert,⁹ P. M. Border,¹⁹ C. Bower,¹² E. Buckley-Geer,⁹ A. Cabrera,²¹ S. Cavanaugh,¹⁰ J. D. Chapman,⁶ D. Cherdack,³⁰ S. Childress,⁹ B. C. Choudhary,⁹ J. H. Cobb,²¹ S. J. Coleman,³² A. J. Culling,⁶ J. K. de Jong,¹¹ M. Dierckxsens,⁴ M. V. Diwan,⁴ M. Dorman,^18,23 D. Drakoulakos,² T. Durkin,²³ S. A. Dytman,²² A. R. Erwin,³³ C. O. Escobar,⁷ J. J. Evans,²¹ E. Falk Harris,²⁷ G. J. Feldman,¹⁰ T. H. Fields,¹ R. Ford,⁹ M. V. Frohne,³ H. R. Gallagher,³⁰ A. Godley,²⁵ J. Gogos,¹⁹ M. C. Goodman,¹ P. Gouffon,²⁴ R. Gran,²⁰ E. W. Grashorn,^19,20 N. Grossman,⁹ K. Grzelak,²¹ A. Habig,²⁰ D. Harris,⁹ P. G. Harris,²⁷ J. Hartnell,²³ E. P. Hartouni,¹⁷ R. Hatcher,⁹ K. Heller,¹⁹ A. Himmel,⁵ A. Holin,¹⁸ C. Howcroft,⁵ J. Hylen,⁹ D. Indurthy,²⁹ G. M. Irwin,²⁶ M. Ishitsuka,¹² D. E. Jaffe,⁴ C. James,⁹ L. Jenner,¹⁸ D. Jensen,⁹ T. Kafka,³⁰ H. J. Kang,²⁶ S. M. S. Kasahara,¹⁹ M. S. Kim,²² G. Koizumi,⁹ S. Kopp,²⁹ M. Kordosky,^32,18 D. J. Koskinen,¹⁸ S. K. Kotelnikov,¹⁶ A. Kreymer,⁹ S. Kumaratunga,¹⁹ K. Lang,²⁹ A. Lebedev,¹⁰ R. Lee,¹⁰ J. Ling,²⁵ J. Liu,²⁹ P. J. Litchfield,¹⁹ R. P. Litchfield,²¹ L. Loiacono,²⁹ P. Lucas,⁹ W. A. Mann,³⁰ A. Marchionni,⁹ A. D. Marino,⁹ M. L. Marshak,¹⁹ J. S. Marshall,⁶ N. Mayer,^12,20 A. M. McGowan,^1,19 J. R. Meier,¹⁹ G. I. Merzon,¹⁶ M. D. Messier,¹² C. J. Metelko,²³ D. G. Michael,⁵ R. H. Milburn,³⁰ J. L. Miller,¹⁵ W. H. Miller,¹⁹ S. R. Mishra,²⁵ A. Mislivec,²⁰ C. D. Moore,⁹ J. Morfín,⁹ L. Mualem,^5,19 S. Mufson,¹² S. Murgia,²⁶ J. Musser,¹² D. Naples,²² J. K. Nelson,³² H. B. Newman,⁵ R. J. Nichol,¹⁸ T. C. Nicholls,²³ J. P. Ochoa-Ricoux,⁵ W. P. Oliver,³⁰ T. Osiecki,²⁹ R. Ospanov,²⁹ J. Paley,¹² V. Paolone,²² A. Para,⁹ T. Patzak,⁸ Ž. Pavlović,²⁹ G. F. Pearce,²³ C. W. Peck,⁵ E. A. Peterson,¹⁹ D. A. Petyt,¹⁹ H. Ping,³³ R. Pittam,²¹ R. K. Plunkett,⁹ D. Rahman,¹⁹ R. A. Rameika,⁹ T. M. Raufer,^23,21 B. Rebel,⁹ J. Reichenbacher,¹ D. E. Reyna,¹ P. A. Rodrigues,²¹ C. Rosenfeld,²⁵ H. A. Rubin,¹¹ K. Ruddick,¹⁹ V. A. Ryabov,¹⁶ R. Saakyan,¹⁸ M. C. Sanchez,¹⁰ N. Saoulidou,⁹ J. Schneps,³⁰ P. Schreiner,³ V. K. Semenov,¹³ S.-M. Seun,¹⁰ P. Shanahan,⁹ W. Smart,⁹ V. Smirnitsky,¹⁴ C. Smith,^18,27 A. Sousa,^21,30 B. Speakman,¹⁹ P. Stamoulis,² M. Strait,¹⁹ P. A. Symes,²⁷ N. Tagg,^30,21 R. L. Talaga,¹ E. Tetteh-Lartey,²⁸ J. Thomas,¹⁸ J. Thompson,²² M. A. Thomson,⁶ J. L. Thron,¹ G. Tinti,²¹ I. Trostin,¹⁴ V. A. Tsarev,¹⁶ G. Tzanakos,² J. Urheim,¹² P. Vahle,^32,18 V. Verebryusov,¹⁴ B. Viren,⁴ C. P. Ward,⁶ D. R. Ward,⁶ M. Watabe,²⁸ A. Weber,^21,23 R. C. Webb,²⁸ A. Wehmann,⁹ N. West,²¹ C. White,¹¹ S. G. Wojcicki,²⁶ D. M. Wright,¹⁷ T. Yang,²⁶ H. Zheng,⁵ M. Zois,² 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, Cambridge CB3 0HE, United Kingdom
⁷Universidade Estadual de Campinas, IF-UNICAMP, CP 6165, 13083-970, Campinas, SP, Brazil
⁸APC – Université Paris 7 Denis Diderot, 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
¹³Institute for High Energy Physics, Protvino, Moscow Region RU-140284, Russia
¹⁴High Energy Experimental Physics Department, Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya, 25, 117218 Moscow, Russia
¹⁵Physics Department, James Madison University, Harrisonburg, Virginia 22807, USA
¹⁶Nuclear Physics Department, Lebedev Physical Institute, Leninsky Prospect 53, 117924 Moscow, Russia
¹⁷Lawrence Livermore National Laboratory, Livermore, California 94550, USA
¹⁸Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
¹⁹University of Minnesota, Minneapolis, Minnesota 55455, USA
²⁰Department of Physics, University of Minnesota– Duluth, Duluth, Minnesota 55812, USA
²¹Subdepartment of Particle Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
²²Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
²³Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom
²⁴Instituto de Física, Universidade de São Paulo, CP 66318, 05315-970, São Paulo, SP, Brazil
²⁵Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA
²⁶Department of Physics, Stanford University, Stanford, California 94305, USA
²⁷Department of Physics and Astronomy, University of Sussex, Falmer, Brighton BN1 9QH, United Kingdom
²⁸Physics Department, Texas A&M University, College Station, Texas 77843, USA
²⁹Department of Physics, University of Texas, Austin, Texas 78712, USA
³⁰Physics Department, Tufts University, Medford, Massachusetts 02155, USA
³¹Physics Department, Western Washington University, Bellingham, Washington 98225, USA
³²Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
³³Physics Department, University of Wisconsin, Madison, Wisconsin 53706, USA

We report the results of a search for nu_µ disappearance by the Main Injector Neutrino Oscillation Search [D. G. Michael et al. (MINOS), Phys. Rev. Lett. 97, 191801 (2006).]. The experiment uses two detectors separated by 734 km to observe a beam of neutrinos created by the Neutrinos at the Main Injector facility at Fermi National Accelerator Laboratory. The data were collected in the first 282 days of beam operations and correspond to an exposure of 1.27×10²⁰ protons on target. Based on measurements in the Near Detector, in the absence of neutrino oscillations we expected 336±14 nu_µ charged-current interactions at the Far Detector but observed 215. This deficit of events corresponds to a significance of 5.2 standard deviations. The deficit is energy dependent and is consistent with two-flavor neutrino oscillations according to |Deltam²|=2.74_-0.26^+0.44×10^-3 eV²/c⁴ and sin²2theta>0.87 at 68% confidence level.

©2008 The American Physical Society

View Cart	Download Citation
MyScitation	Print View