APS » Phys. Rev. D » Volume 75 » Issue 9

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 T. Bergfeld,²⁵ 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 J. D. Chapman,⁶ D. Cherdack,³⁰ S. Childress,⁹ B. C. Choudhary,⁹ J. H. Cobb,²¹ A. J. Culling,⁶ J. K. de Jong,¹¹ A. De Santo,²¹ M. Dierckxsens,⁴ M. V. Diwan,⁴ M. Dorman,^18,23 D. Drakoulakos,² T. Durkin,²³ 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 G. A. Giurgiu,¹ 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. 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. Joffe-Minor,¹ T. Kafka,³⁰ H. J. Kang,²⁶ S. M. S. Kasahara,¹⁹ M. S. Kim,²² G. Koizumi,⁹ S. Kopp,²⁹ M. Kordosky,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 P. Lucas,⁹ W. A. Mann,³⁰ A. Marchionni,⁹ A. D. Marino,⁹ M. L. Marshak,¹⁹ J. S. Marshall,⁶ N. Mayer,²⁰ A. M. McGowan,^1,19 J. R. Meier,¹⁹ G. I. Merzon,¹⁶ M. D. Messier,¹² D. G. Michael,⁵ R. H. Milburn,³⁰ J. L. Miller,¹⁵ W. H. Miller,¹⁹ S. R. Mishra,²⁵ A. Mislivec,²⁰ P. S. Miyagawa,²¹ 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. Piteira,⁸ R. Pittam,²¹ R. K. Plunkett,⁹ D. Rahman,¹⁹ R. A. Rameika,⁹ T. M. Raufer,²¹ B. Rebel,⁹ J. Reichenbacher,¹ D. E. Reyna,¹ 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 P. A. Symes,²⁷ N. Tagg,^21,30 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,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 Q. K. Wu,²⁵ T. Yang,²⁶ F. X. Yumiceva,³² 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, Madingley Road, Cambridge CB3 0HE, United Kingdom
⁷Universidade Estadual de Campinas, IF-UNICAMP, CP 6165, 13083-970, Campinas, SP, Brazil
⁸APC-Collège de France, 11 Place Marcelin Berthelot, F-75231 Paris Cedex 05, 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
¹²Departments of Physics and Astronomy, Indiana 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, 1 University Station, 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 found 140 neutrino-induced muons in 854.24 live days in the MINOS far detector, which has an acceptance for neutrino-induced muons of 6.91×10⁶ cm² sr. We looked for evidence of neutrino disappearance in this data set by computing the ratio of the number of low momentum muons to the sum of the number of high momentum and unknown momentum muons for both data and Monte Carlo expectation in the absence of neutrino oscillations. The ratio of data and Monte Carlo ratios, [script R], is [script R]=0.65_-0.12^+0.15(stat)±0.09(syst), a result that is consistent with an oscillation signal. A fit to the data for the oscillation parameters sin²2theta₂₃ and Deltam₂₃² excludes the null oscillation hypothesis at the 94% confidence level. We separated the muons into µ^- and µ⁺ in both the data and Monte Carlo events and found the ratio of the total number of µ^- to µ⁺ in both samples. The ratio of those ratios, [script R]^_CPT, is a test of CPT conservation. The result [script R]^_CPT=0.72_-0.18^+0.24(stat)_-0.04^+0.08(syst) is consistent with CPT conservation.

©2007 The American Physical Society

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