Evidence of electron neutrino appearance in a muon neutrino beam

被引：121

作者：

Abe, K.

Abgrall, N. ^{[14
]}

Aihara, H. ^{[50
,63
]}

Akiri, T. ^{[11
]}

Albert, J. B. ^{[11
]}

Andreopoulos, C. ^{[48
,49
]}

Aoki, S. ^{[30
]}

Ariga, A. ^{[2
,49
]}

Ariga, T.

Assylbekov, S. ^{[9
]}

Autiero, D. ^{[34
]}

Barbi, M.

Barker, G. J. ^{[58
]}

Barr, G. ^{[39
]}

Bass, M. ^{[9
]}

Batkiewicz, M. ^{[15
]}

Bay, F. ^{[13
]}

Bentham, S. W. ^{[32
]}

Berardi, V. ^{[21
,22
]}

Berger, B. E. ^{[9
]}

Berkman, S. ^{[4
]}

Bertram, I. ^{[32
]}

Beznosko, D. ^{[37
]}

Bhadra, S. ^{[62
]}

Blaszczyk, F. D. M. ^{[33
]}

Blondel, A. ^{[14
]}

Bojechko, C. ^{[55
]}

Boyd, S. ^{[58
]}

Brailsford, D. ^{[20
]}

Bravar, A. ^{[14
]}

Bronner, C. ^{[31
]}

Brook-Roberge, D. G. ^{[4
]}

Buchanan, N. ^{[9
]}

Calland, R. G.

Rodriguez, J. Caravaca ^{[17
]}

Cartwright, S. L. ^{[46
]}

Castillo, R.

Catanesi, M. G. ^{[21
,22
]}

Cervera, A. ^{[18
,19
]}

Cherdack, D. ^{[9
]}

Christodoulou, G.

Clifton, A. ^{[9
]}

Coleman, J.

Coleman, S. J. ^{[8
]}

Collazuol, G. ^{[25
,26
]}

Connolly, K. ^{[59
]}

Cremonesi, L. ^{[42
]}

Curioni, A. ^{[13
]}

Dabrowska, A. ^{[15
]}

Danko, I. ^{[41
]}

机构：

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

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

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

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

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

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

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

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

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

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

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

[12] Ecole Polytech, Lab Leprince Ringuet, IN2P3 CNRS, Palaiseau, France

[13] Swiss Fed Inst Technol, Inst Particle Phys, Zurich, Switzerland

[14] Univ Geneva, DPNC, Sect Phys, Geneva, Switzerland

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

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

[17] IFAE, Bellaterra, Barcelona, Spain

[18] CSIC, IFIC, Valencia, Spain

[19] Univ Valencia, Valencia, Spain

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

[21] INFN Sez Bari, Dipartimento Interuniv Fis, Bari, Italy

[22] Univ Politecn Bari, Bari, Italy

[23] INFN Sez Napoli, Dipartimento Fis, Naples, Italy

[24] Univ Naples Federico II, Naples, Italy

[25] INFN Sez Padova, Dipartimento Fis, Padua, Italy

[26] Univ Padua, Padua, Italy

[27] INFN Sez Roma, Rome, Italy

[28] Univ Roma La Sapienza, I-00185 Rome, Italy

[29] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

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

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

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

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

[34] Univ Lyon 1, IPN Lyon IN2P3, Villeurbanne, France

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

[36] Natl Ctr Nucl Res, Warsaw, Poland

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

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

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

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

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

[42] Queen Mary Univ London, Sch Phys & Astron, London, England

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

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

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

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

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

[48] Harwell Oxford, STFC, Rutherford Appleton Lab, Warrington, Cheshire, England

[49] SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

[50] Univ Tokyo, Dept Phys, Tokyo 113, Japan

来源：

PHYSICAL REVIEW D | 2013年 / 88卷 / 03期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

ABSORPTION CROSS-SECTIONS; MOMENTUM RANGE; GEV-C; NUCLEI; PROTONS; SIMULATION; PIONS; FLUX; ANTIPROTONS; SCATTERING;

D O I：

10.1103/PhysRevD.88.032002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The T2K Collaboration reports evidence for electron neutrino appearance at the atmospheric mass splitting, vertical bar Delta m(32)(2)vertical bar approximate to 2.4 X 10(-3) eV(2). An excess of electron neutrino interactions over background is observed from a muon neutrino beam with a peak energy of 0.6 GeV at the Super-Kamiokande (SK) detector 295 km from the beam's origin. Signal and background predictions are constrained by data from near detectors located 280 m from the neutrino production target. We observe 11 electron neutrino candidate events at the SK detector when a background of 3.3 +/- 0.4(syst) events is expected. The background-only hypothesis is rejected with a p value of 0.0009 (3.1 sigma), and a fit assuming nu(mu) -> nu(e) oscillations with sin (2)2 theta(23) = 1, delta(CP) = 0 and vertical bar Delta m(32)(2)vertical bar = 2.4 X 10(-3) eV(2) yields sin (2)2 theta(13) = 0.088(-0.039)(+0.049)(stat + syst).

引用

页数：41

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