Improved constraints on neutrino mixing from the T2K experiment with 3.13 x 1021 protons on target

被引:92
作者
Abe, K. [61 ]
Akhlaq, N. [51 ]
Akutsu, R. [67 ]
Ali, A. [36 ]
Alt, C. [9 ]
Andreopoulos, C. [40 ,58 ,59 ]
Antonova, M. [17 ,18 ]
Aoki, S. [35 ]
Arihara, T. [64 ]
Asada, Y. [74 ]
Ashida, Y. [36 ]
Atkin, E. T. [20 ]
Awataguchi, Y. [64 ]
Barker, G. J. [71 ]
Barr, G. [48 ]
Barrow, D. [48 ]
Batkiewicz-Kwasniak, M. [13 ]
Beloshapkin, A. [30 ]
Bench, F. [40 ]
Berardi, V [21 ,22 ,23 ]
Berns, L. [63 ]
Bhadra, S. [75 ]
Blanchet, A. [57 ]
Blondel, A. [11 ,57 ]
Bolognesi, S. [5 ]
Bonus, T. [73 ]
Bourguille, B. [16 ]
Boyd, S. B. [71 ]
Bravar, A. [11 ]
Bravo Berguno, D. [1 ]
Bronner, C. [61 ]
Bron, S. [11 ]
Bubak, A. [56 ]
Avanzini, M. Buizza [39 ]
Cao, S. [19 ]
Cartwright, S. L. [55 ]
Catanesi, M. G. [21 ,22 ,23 ]
Cervera, A. [17 ,18 ]
Chakrani, J. [39 ]
Cherdack, D. [15 ]
Christodoulou, G. [10 ]
Cicerchia, M. [26 ,27 ]
Coleman, J. [40 ]
Collazuol, G. [26 ,27 ]
Cook, L. [32 ,48 ]
Coplowe, D. [48 ]
Cudd, A. [6 ]
De Rosa, G. [24 ,25 ]
Dealtry, T. [37 ]
Delogu, C. C. [26 ,27 ]
机构
[1] Univ Autonoma Madrid, Dept Theoret Phys, Madrid 28049, Spain
[2] Univ Bern, Albert Einstein Ctr Fundamental Phys, Lab High Energy Phys LHEP, Bern, Switzerland
[3] Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA
[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA USA
[5] Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France
[6] Univ Colorado, Dept Phys, Boulder, CO 80309 USA
[7] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA
[8] Duke Univ, Dept Phys, Durham, NC 27706 USA
[9] Swiss Fed Inst Technol, Inst Particle Phys & Astrophys, Zurich, Switzerland
[10] CERN European Org Nucl Res, CH-1211 Geneva 23, Switzerland
[11] Univ Geneva, Sect Phys, DPNC, Geneva, Switzerland
[12] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland
[13] H Niewodniczanski Inst Nucl Phys PAN, Krakow, Poland
[14] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan
[15] Univ Houston, Dept Phys, Houston, TX USA
[16] Barcelona Inst Sci & Technol, Inst Fis Altes Energies IFAE, Campus UAB, Bellaterra, Barcelona, Spain
[17] CSIC, IFIC, Valencia, Spain
[18] Univ Valencia, Valencia, Spain
[19] ICISE, Inst Interdisciplinary Res Sci & Educ IFIRSE, Quy Nhon, Vietnam
[20] Imperial Coll London, Dept Phys, London, England
[21] Ist Nazl Fis Nucl, Sez Bari, Bari, Italy
[22] Univ Bari, Bari, Italy
[23] Politecn Bari, Dipartimento Interuniv Fis, Bari, Italy
[24] Ist Nazl Fis Nucl, Sez Napoli, Naples, Italy
[25] Univ Napoli, Dipartimento Fis, Naples, Italy
[26] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy
[27] Univ Padua, Dipartimento Fis, Padua, Italy
[28] Ist Nazl Fis Nucl, Sez Roma, Rome, Italy
[29] Univ Roma La Sapienza, Rome, Italy
[30] Russian Acad Sci, Inst Nucl Res, Moscow, Russia
[31] Vietnam Acad Sci & Technol VAST, Inst Phys IOP, Int Ctr Phys, 10 Dao Tan, Hanoi, Vietnam
[32] Univ Tokyo, Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba, Japan
[33] Keio Univ, Dept Phys, Yokohama, Kanagawa, Japan
[34] Kings Coll London, Dept Phys, London WC2R 2LS, England
[35] Kobe Univ, Kobe, Hyogo, Japan
[36] Kyoto Univ, Dept Phys, Kyoto, Japan
[37] Univ Lancaster, Phys Dept, Lancaster, England
[38] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[39] Ecole Polytech, Lab Leprince Ringuet, IN2P3 CNRS, Palaiseau, France
[40] Univ Liverpool, Dept Phys, Liverpool, Merseyside, England
[41] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[42] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[43] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi, Japan
[44] Natl Ctr Nucl Res, Warsaw, Poland
[45] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
[46] Okayama Univ, Dept Phys, Okayama, Japan
[47] Osaka City Univ, Dept Phys, Osaka, Japan
[48] Univ Oxford, Dept Phys, Oxford, England
[49] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[50] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA
基金
加拿大自然科学与工程研究理事会; 英国科学技术设施理事会; 瑞士国家科学基金会; 欧盟地平线“2020”;
关键词
PION-PRODUCTION; CP-VIOLATION; HIGH-ENERGY; MATTER; OSCILLATIONS; CHALLENGES; SYSTEM;
D O I
10.1103/PhysRevD.103.112008
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The T2K experiment reports updated measurements of neutrino and antineutrino oscillations using both appearance and disappearance channels. This result comes from an exposure of 14.9(16.4) x 10(20) protons on target in neutrino (antineutrino) mode. Significant improvements have been made to the neutrino interaction model and far detector reconstruction. An extensive set of simulated data studies have also been performed to quantify the effect interaction model uncertainties have on the T2K oscillation parameter sensitivity. T2K performs multiple oscillation analyses that present both frequentist and Bayesian intervals for the Pontecorvo-Maki-Nakagawa-Sakata parameters. For fits including a constraint on sin(2)theta(13) from reactor data and assuming normal mass ordering T2K measures sin(2)theta(13) = 0.53(-0.04)(+0.03) and Delta m(32)(2) = (2.45 +/- 0.07) x 10(-3) eV(2) c(-4). The Bayesian analyses show a weak preference for normal mass ordering 89)% posterior probability) and the upper sin(2)theta(13) octant (80% posterior probability), with a uniform prior probability assumed in both cases. The T2K data exclude CP conservation in neutrino oscillations at the 2 sigma level.
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页数:59
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