Search for anomalies in the νe appearance from a νμ beam

被引：71

作者：

Antonello, M. ^{[1
]}

Baibussinov, B. ^{[2
,3
]}

Benetti, P. ^{[4
,5
]}

Boffelli, F. ^{[4
,5
]}

Bubak, A. ^{[15
]}

Calligarich, E. ^{[4
,5
]}

Canci, N. ^{[1
]}

Centro, S. ^{[2
,3
]}

Cesana, A. ^{[6
,7
]}

Cieslik, K. ^{[8
]}

Cline, D. B. ^{[9
]}

Cocco, A. G. ^{[10
,11
]}

Dabrowska, A. ^{[8
]}

Dequal, D. ^{[2
,3
]}

Dermenev, A. ^{[12
]}

Dolfini, R. ^{[4
,5
]}

Falcone, A. ^{[4
,5
]}

Farnese, C. ^{[2
,3
]}

Fava, A. ^{[2
,3
]}

Ferrari, A. ^{[13
]}

Fiorillo, G. ^{[10
,11
]}

Gibin, D. ^{[2
,3
]}

Gninenko, S. ^{[12
]}

Guglielmi, A. ^{[2
,3
]}

Haranczyk, M. ^{[8
]}

Holeczek, J. ^{[15
]}

Kirsanow, M. ^{[12
]}

Kisiel, J. ^{[15
]}

Kochanek, I. ^{[15
]}

Lagoda, J. ^{[14
]}

Mania, S. ^{[15
]}

Menegolli, A. ^{[4
,5
]}

Meng, G. ^{[2
,3
]}

Montanari, C. ^{[4
,5
]}

Otwinowski, S. ^{[9
]}

Picchi, P. ^{[16
]}

Pietropaolo, F. ^{[2
,3
]}

Plonski, P. ^{[18
]}

Rappoldi, A. ^{[4
,5
]}

Raselli, G. L. ^{[4
,5
]}

Rossella, M. ^{[4
,5
]}

Rubbia, C. ^{[1
,13
,17
]}

Sala, P. ^{[6
,7
]}

Scaramelli, A. ^{[6
,7
]}

Segreto, E. ^{[1
]}

Sergiampietri, F. ^{[19
]}

Stefan, D. ^{[1
]}

Sulej, R. ^{[13
,14
]}

Szarska, M. ^{[8
]}

Terrani, M. ^{[6
,7
]}

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Assergi, Italy

[2] Univ Padua, Dipartimento Fis & Astron, Padua, Italy

[3] Ist Nazl Fis Nucl, Padua, Italy

[4] Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy

[5] Ist Nazl Fis Nucl, I-27100 Pavia, Italy

[6] Politecn Milan, I-20133 Milan, Italy

[7] Ist Nazl Fis Nucl, I-20133 Milan, Italy

[8] Polish Acad Sci, H Niewodniczanski Inst Nucl Phys, Krakow, Poland

[9] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA

[10] Univ Naples Federico II, Dipartimento Sci Fis, Naples, Italy

[11] Ist Nazl Fis Nucl, I-80125 Naples, Italy

[12] INR RAS, Moscow, Russia

[13] CERN, Geneva, Switzerland

[14] Natl Ctr Nucl Res, Otwock, Poland

[15] Univ Silesia, Inst Phys, Katowice, Poland

[16] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[17] GSSI, Laquila, Italy

[18] Warsaw Univ Technol, Inst Radioelect, Warsaw, Poland

[19] Ist Nazl Fis Nucl, Pisa, Italy

来源：

EUROPEAN PHYSICAL JOURNAL C | 2013年 / 73卷 / 10期

关键词：

DETECTOR;

D O I：

10.1140/epjc/s10052-013-2599-z

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We report an updated result from the ICARUS experiment on the search for nu(mu) -> nu(e) anomalies with the CNGS beam, produced at CERN with an average energy of 20 GeV and traveling 730 km to the Gran Sasso Laboratory. The present analysis is based on a total sample of 1995 events of CNGS neutrino interactions, which corresponds to an almost doubled sample with respect to the previously published result. Four clear nu(e) events have been visually identified over the full sample, compared with an expectation of 6.4 +/- 0.9 events from conventional sources. The result is compatible with the absence of additional anomalous contributions. At 90 % and 99 % confidence levels, the limits to possible oscillated events are 3.7 and 8.3 respectively. The corresponding limit to oscillation probability becomes consequently 3.4 x 10(-3) and 7.6 x 10(-3), respectively. The present result confirms, with an improved sensitivity, the early result already published by the ICARUS Collaboration.

引用

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