Unexplained Excess of Electronlike Events from a 1-GeV Neutrino Beam

被引:309
作者
Aguilar-Arevalo, A. A. [4 ]
Anderson, C. E. [17 ]
Bazarko, A. O. [14 ]
Brice, S. J. [6 ]
Brown, B. C. [6 ]
Bugel, L. [4 ]
Cao, J. [13 ]
Coney, L. [4 ]
Conrad, J. M. [4 ,12 ]
Cox, D. C. [9 ]
Curioni, A. [17 ]
Djurcic, Z. [4 ]
Finley, D. A. [6 ]
Fleming, B. T. [17 ]
Ford, R. [6 ]
Garcia, F. G. [6 ]
Garvey, G. T. [10 ]
Green, C. [6 ,10 ]
Green, J. A. [9 ,10 ]
Hart, T. L. [3 ]
Hawker, E. [10 ,18 ]
Imlay, R. [11 ]
Johnson, R. A. [18 ]
Karagiorgi, G. [4 ,12 ]
Kasper, P. [6 ]
Katori, T. [9 ]
Kobilarcik, T. [6 ]
Kourbanis, I. [6 ]
Koutsoliotas, S. [2 ]
Laird, E. M. [14 ]
Linden, S. K. [17 ]
Link, J. M. [16 ]
Liu, Y. [1 ,13 ]
Liu, Y. [1 ,13 ]
Louis, W. C. [10 ]
Mahn, K. B. M. [4 ]
Marsh, W. [6 ]
McGregor, G. [10 ]
Metcalf, W. [11 ]
Meyers, P. D. [14 ]
Mills, F. [6 ]
Mills, G. B. [10 ]
Monroe, J. [4 ,12 ]
Moore, C. D. [6 ]
Nelson, R. H. [3 ]
Nguyen, V. T. [4 ,12 ]
Nienaber, P. [15 ]
Nowak, J. A. [11 ]
Ouedraogo, S. [11 ]
Patterson, R. B. [14 ]
机构
[1] Univ Alabama, Tuscaloosa, AL 35487 USA
[2] Bucknell Univ, Lewisburg, PA 17837 USA
[3] Univ Colorado, Boulder, CO 80309 USA
[4] Columbia Univ, New York, NY 10027 USA
[5] Embry Riddle Aeronaut Univ, Prescott, AZ 86301 USA
[6] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[7] Univ Florida, Gainesville, FL 32611 USA
[8] Univ Illinois, Urbana, IL 61801 USA
[9] Indiana Univ, Bloomington, IN 47405 USA
[10] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[11] Louisiana State Univ, Baton Rouge, LA 70803 USA
[12] MIT, Cambridge, MA 02139 USA
[13] Univ Michigan, Ann Arbor, MI 48109 USA
[14] Princeton Univ, Princeton, NJ 08544 USA
[15] St Marys Univ Minnesota, Winona, MN 55987 USA
[16] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA
[17] Yale Univ, New Haven, CT 06520 USA
[18] Univ Cincinnati, Cincinnati, OH 45221 USA
基金
美国国家科学基金会;
关键词
PARTICLE-PRODUCTION; OSCILLATIONS; PROTONS;
D O I
10.1103/PhysRevLett.102.101802
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The MiniBooNE Collaboration observes unexplained electronlike events in the reconstructed neutrino energy range from 200 to 475 MeV. With 6.46 x 10(20) protons on target, 544 electronlike events are observed in this energy range, compared to an expectation of 415.2 +/- 43.4 events, corresponding to an excess of 128.8 +/- 20.4 +/- 38.3 events. The shape of the excess in several kinematic variables is consistent with being due to either nu(e) and (nu) over bar (e) charged-current scattering or nu(mu) neutral-current scattering with a photon in the final state. No significant excess of events is observed in the reconstructed neutrino energy range from 475 to 1250 MeV, where 408 events are observed compared to an expectation of 385.9 +/- 35.7 events.
引用
收藏
页数:5
相关论文
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