Indication of Electron Neutrino Appearance from an Accelerator-Produced Off-Axis Muon Neutrino Beam

被引：1118

作者：

Abe, K. ^{[1
]}

Abgrall, N. ^{[17
]}

Ajima, Y. ^{[19
,64
]}

Aihara, H.

Albert, J. B. ^{[14
]}

Andreopoulos, C. ^{[53
]}

Andrieu, B. ^{[43
]}

Aoki, S. ^{[33
]}

Araoka, O. ^{[19
,64
]}

Argyriades, J. ^{[17
]}

Ariga, A. ^{[4
]}

Ariga, T. ^{[4
]}

Assylbekov, S. ^{[12
]}

Autiero, D. ^{[38
]}

Badertscher, A. ^{[16
]}

Barbi, M. ^{[46
]}

Barker, G. J. ^{[60
]}

Barr, G. ^{[42
]}

Bass, M. ^{[12
]}

Bay, F. ^{[4
]}

Bentham, S. ^{[35
]}

Berardi, V. ^{[24
,25
]}

Berger, B. E. ^{[12
]}

Bertram, I. ^{[35
]}

Besnier, M. ^{[15
]}

Beucher, J. ^{[9
]}

Beznosko, D. ^{[40
]}

Bhadra, S. ^{[63
]}

Blaszczyk, F. D. M. M. ^{[9
]}

Blondel, A. ^{[17
]}

Bojechko, C. ^{[57
]}

Bouchez, J. ^{[9
]}

Boyd, S. B. ^{[60
]}

Bravar, A. ^{[17
]}

Bronner, C. ^{[15
]}

Brook-Roberge, D. G. ^{[6
]}

Buchanan, N. ^{[12
]}

Budd, H. ^{[47
]}

Calvet, D. ^{[9
]}

Cartwright, S. L. ^{[50
]}

Carver, A. ^{[60
]}

Castillo, R. ^{[20
]}

Catanesi, M. G. ^{[24
,25
]}

Cazes, A. ^{[38
]}

Cervera, A. ^{[21
,22
]}

Chavez, C. ^{[36
]}

Choi, S. ^{[49
]}

Christodoulou, G. ^{[36
]}

Coleman, J. ^{[36
]}

Coleman, W. ^{[37
]}

机构：

[1] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Kamioka, Akita, Japan

[2] Univ Alberta, Dept Phys, Ctr Particle Phys, Edmonton, AB, Canada

[3] Andrzej Soltan Inst Nucl Studies, Warsaw, Poland

[4] Univ Bern, Albert Einstein Ctr Fundamental Phys, LHEP, Bern, Switzerland

[5] Boston Univ, Dept Phys, Boston, MA 02215 USA

[6] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V5Z 1M9, Canada

[7] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[8] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA USA

[9] CEA Saclay, IRFU, F-91191 Gif Sur Yvette, France

[10] Chonnam Natl Univ, Inst Universe & Elementary Particles, Kwangju, South Korea

[11] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[12] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA

[13] Dongshin Univ, Dept Phys, Naju, South Korea

[14] Duke Univ, Dept Phys, Durham, NC 27706 USA

[15] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[16] ETH, Inst Particle Phys, Zurich, Switzerland

[17] Univ Geneva, DPNC, Sect Phys, CH-1211 Geneva, Switzerland

[18] H Niewodniczanski Inst Nucl Phys PAN, Krakow, Poland

[19] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan

[20] IFAE, Bellaterra, Barcelona, Spain

[21] CSIC, IFIC, Valencia, Spain

[22] Univ Valencia, Valencia, Spain

[23] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London, England

[24] INFN Sez Bari, Bari, Italy

[25] Univ Politecn Bari, Dipartimento Interuniv Fis, Bari, Italy

[26] Univ Naples Federico II, Dipartimento Fis, Naples, Italy

[27] INFN Sez Napoli, Naples, Italy

[28] Univ Padua, Dipartimento Fis, Padua, Italy

[29] INFN Sez Padova, Padua, Italy

[30] Univ Roma La Sapienza, Rome, Italy

[31] INFN Sez Roma, Rome, Italy

[32] Russian Acad Sci, Inst Nucl Res, Moscow, Russia

[33] Kobe Univ, Kobe, Hyogo 657, Japan

[34] Kyoto Univ, Dept Phys, Kyoto 606, Japan

[35] Univ Lancaster, Dept Phys, Lancaster, England

[36] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[37] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[38] Univ Lyon 1, Univ Lyon, IPN Lyon IN2P3, F-69622 Villeurbanne, France

[39] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi, Japan

[40] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[41] Osaka City Univ, Dept Phys, Osaka 558, Japan

[42] Univ Oxford, Dept Phys, Oxford, England

[43] Univ Paris Diderot, UPMC, CNRS IN2P3, LPNHE, Paris, France

[44] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[45] Queen Mary Univ London, Sch Phys, London, England

[46] Univ Regina, Dept Phys, Regina, SK S4S 0A2, Canada

[47] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA

[48] Rhein Westfal TH Aachen, Inst Phys 3, Aachen, Germany

[49] Seoul Natl Univ, Dept Phys & Astron, Seoul, South Korea

[50] Univ Sheffield, Dept Phys & Astron, Sheffield, S Yorkshire, England

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.107.041801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The T2K experiment observes indications of nu(mu) -> nu(mu) e appearance in data accumulated with 1.43 x 10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Delta m(23)(2)| = 2.4 x 10(-3) eV(2), sin(2)2 theta(23) = 1 and sin(2)2 theta(13) = 0, the expected number of such events is 1.5 +/- 0.3(syst). Under this hypothesis, the probability to observe six or more candidate events is 7 x 10(-3), equivalent to 2.5 sigma significance. At 90% C.L., the data are consistent with 0.03(0.04) < sin(2)2 theta(13) < 0.28(0.34) for delta(CP) = 0 and a normal (inverted) hierarchy.

引用

页数：8

共 38 条

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