APS » Phys. Rev. Lett. » Volume 102 » Issue 21

P. Adamson,⁸ A. A. Aguilar-Arevalo,⁶ C. E. Anderson,²² A. O. Bazarko,¹⁵ M. Bishai,² S. J. Brice,⁸ B. C. Brown,⁸ L. Bugel,⁶ J. Cao,¹³ B. C. Choudhary,⁸ L. Coney,⁶ J. M. Conrad,¹⁴ D. C. Cox,¹⁰ A. Curioni,²² Z. Djurcic,⁶ D. A. Finley,⁸ B. T. Fleming,²² R. Ford,⁸ H. R. Gallagher,¹⁸ F. G. Garcia,⁸ G. T. Garvey,¹¹ C. Green,^11,8 J. A. Green,^10,11 D. Harris,⁸ T. L. Hart,⁵ E. Hawker,²⁰ J. Hylen,⁸ R. Imlay,¹² R. A. Johnson,⁴ G. Karagiorgi,¹⁴ P. Kasper,⁸ T. Katori,¹⁰ T. Kobilarcik,⁸ S. Kopp,¹⁷ I. Kourbanis,⁸ S. Koutsoliotas,³ E. M. Laird,¹⁵ S. K. Linden,²² J. M. Link,¹⁹ Y. Liu,¹³ Y. Liu,¹ L. Loiacono,¹⁷ W. C. Louis,¹¹ A. Marchionni,⁸ K. B. M. Mahn,⁶ W. Marsh,⁸ G. McGregor,¹¹ M. D. Messier,¹⁰ W. Metcalf,¹² P. D. Meyers,¹⁵ F. Mills,⁸ G. B. Mills,¹¹ J. Monroe,¹⁴ C. D. Moore,⁸ J. K. Nelson,²¹ R. H. Nelson,⁵ V. T. Nguyen,¹⁴ P. Nienaber,¹⁶ J. A. Nowak,¹² S. Ouedraogo,¹² R. B. Patterson,¹⁵ Z. Pavlovic,¹⁷ D. Perevalov,¹ C. C. Polly,¹⁰ E. Prebys,⁸ J. L. Raaf,⁴ H. Ray,^11,9 B. P. Roe,¹³ A. D. Russell,⁸ V. Sandberg,¹¹ R. Schirato,¹¹ D. Schmitz,⁶ M. H. Shaevitz,⁶ F. C. Shoemaker,¹⁵ W. Smart,⁸ D. Smith,⁷ M. Sodeberg,²² M. Sorel,⁶ P. Spentzouris,⁸ I. Stancu,¹ R. J. Stefanski,⁸ M. Sung,¹² H. A. Tanaka,¹⁵ R. Tayloe,¹⁰ M. Tzanov,⁵ P. Vahle,²¹ R. Van de Water,¹¹ B. Viren,² M. O. Wascko,¹² D. H. White,¹¹ M. J. Wilking,⁵ H. J. Yang,¹³ F. X. Yumiceva,²¹ G. P. Zeller,^6,11 E. D. Zimmerman,⁵ and R. Zwaska^8
1University of Alabama, Tuscaloosa, Alabama 35487, USA
²Brookhaven National Laboratory, Upton, New York 11973, USA
³Bucknell University, Lewisburg, Pennsylvania 17837, USA
⁴University of Cincinnati, Cincinnati, Ohio 45221, USA
⁵University of Colorado, Boulder, Colorado 80309, USA
⁶Columbia University, New York, New York 10027, USA
⁷Embry-Riddle Aeronautical University, Prescott, Arizona 86301, USA
⁸Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
⁹University of Florida, Gainesville, Florida 32611, USA
¹⁰Indiana University, Bloomington, Indiana 47405, USA
¹¹Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
¹²Louisiana State University, Baton Rouge, Louisiana 70803, USA
¹³University of Michigan, Ann Arbor, Michigan 48109, USA
¹⁴Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
¹⁵Princeton University, Princeton, New Jersey 08544, USA
¹⁶Saint Mary's University of Minnesota, Winona, Minnesota 55987, USA
¹⁷University of Texas, Austin, Texas 78712, USA
¹⁸Tufts University, Medford, Massachusetts 02155, USA
¹⁹Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
²⁰Western Illinois University, Macomb, Illinois 61455, USA
²¹College of William & Mary, Williamsburg, Virginia 23187, USA
²²Yale University, New Haven, Connecticut 06520, USA

We report the first observation of off-axis neutrino interactions in the MiniBooNE detector from the NuMI beam line at Fermilab. The MiniBooNE detector is located 745 m from the NuMI production target, at 110 mrad angle (6.3°) with respect to the NuMI beam axis. Samples of charged-current quasielastic _µ and _e interactions are analyzed and found to be in agreement with expectation. This provides a direct verification of the expected pion and kaon contributions to the neutrino flux and validates the modeling of the NuMI off-axis beam.

©2009 The American Physical Society

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