Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment

被引：150

作者：

An, F. P. ^{[1
]}

Balantekin, A. B. ^{[2
]}

Band, H. R. ^{[3
]}

Bishai, M. ^{[4
]}

Blyth, S. ^{[5
,6
]}

Cao, D. ^{[7
]}

Cao, G. F. ^{[8
]}

Cao, J. ^{[8
]}

Cen, W. R. ^{[8
]}

Chan, Y. L. ^{[9
]}

Chang, J. F. ^{[8
]}

Chang, L. C. ^{[10
]}

Chang, Y. ^{[6
]}

Chen, H. S. ^{[8
]}

Chen, Q. Y. ^{[11
]}

Chen, S. M. ^{[12
]}

Chen, Y. X. ^{[13
]}

Chen, Y. ^{[14
]}

Cheng, J. -H. ^{[10
]}

Cheng, J. ^{[11
]}

Cheng, Y. P. ^{[8
]}

Cheng, Z. K. ^{[15
]}

Cherwinka, J. J. ^{[2
]}

Chu, M. C. ^{[9
]}

Chukanov, A. ^{[16
]}

Cummings, J. P. ^{[17
]}

de Arcos, J. ^{[18
]}

Deng, Z. Y. ^{[8
]}

Ding, X. F. ^{[8
]}

Ding, Y. Y. ^{[8
]}

Diwan, M. V. ^{[4
]}

Dolgareva, M. ^{[16
]}

Dove, J. ^{[19
]}

Dwyer, D. A. ^{[20
]}

Edwards, W. R. ^{[20
]}

Gill, R. ^{[4
]}

Gonchar, M. ^{[16
]}

Gong, G. H. ^{[12
]}

Gong, H. ^{[12
]}

Grassi, M. ^{[8
]}

Gu, W. Q. ^{[21
]}

Guan, M. Y. ^{[8
]}

Guo, L. ^{[12
]}

Guo, X. H. ^{[22
]}

Guo, Y. H. ^{[23
]}

Guo, Z. ^{[12
]}

Hackenburg, R. W. ^{[4
]}

Han, R. ^{[13
]}

Hans, S. ^{[4
,44
]}

He, M. ^{[8
]}

机构：

[1] East China Univ Sci & Technol, Inst Modern Phys, Shanghai, Peoples R China

[2] Univ Wisconsin, Madison, WI 53706 USA

[3] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[4] Brookhaven Natl Lab, Upton, NY 11973 USA

[5] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan

[6] Natl United Univ, Miaoli, Taiwan

[7] Nanjing Univ, Nanjing, Peoples R China

[8] Inst High Energy Phys, Beijing, Peoples R China

[9] Chinese Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China

[10] Natl Chiao Tung Univ, Inst Phys, Hsinchu, Taiwan

[11] Shandong Univ, Jinan, Peoples R China

[12] Tsinghua Univ, Dept Engn Phys, Beijing, Peoples R China

[13] North China Elect Power Univ, Beijing, Peoples R China

[14] Shenzhen Univ, Shenzhen, Peoples R China

[15] Sun Yat Sen Zhongshan Univ, Guangzhou, Guangdong, Peoples R China

[16] Joint Inst Nucl Res, Dubna, Moscow Region, Russia

[17] Siena Coll, Loudonville, NY 12211 USA

[18] Illinois Inst Technol, Dept Phys, Chicago, IL 60616 USA

[19] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[20] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[21] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai Lab Particle Phys & Cosmol, Shanghai, Peoples R China

[22] Beijing Normal Univ, Beijing, Peoples R China

[23] Xi An Jiao Tong Univ, Xian, Peoples R China

[24] Univ Houston, Dept Phys, Houston, TX 77204 USA

[25] Virginia Tech, Ctr Neutrino Phys, Blacksburg, VA 24061 USA

[26] China Inst Atom Energy, Beijing, Peoples R China

[27] Univ Sci & Technol China, Hefei, Peoples R China

[28] Nankai Univ, Sch Phys, Tianjin, Peoples R China

[29] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA

[30] Temple Univ, Coll Sci & Technol, Dept Phys, Philadelphia, PA 19122 USA

[31] Dongguan Univ Technol, Dongguan, Peoples R China

[32] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[33] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[34] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic

[35] Princeton Univ, Joseph Henry Labs, Princeton, NJ 08544 USA

[36] Pontificia Univ Catolica Chile, Inst Fis, Santiago, Chile

[37] CALTECH, Pasadena, CA 91125 USA

[38] Coll William & Mary, Williamsburg, VA 23187 USA

[39] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA

[40] China Gen Nucl Power Grp, Shenzhen, Peoples R China

[41] Natl Univ Def Technol, Coll Electron Sci & Engn, Changsha, Peoples R China

[42] Iowa State Univ, Ames, IA 50011 USA

[43] Chongqing Univ, Chongqing, Peoples R China

[44] CUNY Bronx Community Coll, Dept Chem & Chem Technol, Bronx, NY 10453 USA

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 07期

基金：

美国国家科学基金会; 中国国家自然科学基金; 俄罗斯基础研究基金会;

关键词：

REACTOR NEUTRINO EXPERIMENT; FLUX; CALIBRATION; SYSTEM; DETECTORS; LIBRARY; DECAY; LI-9;

D O I：

10.1103/PhysRevD.95.072006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A measurement of electron antineutrino oscillation by the Daya Bay Reactor Neutrino Experiment is described in detail. Six 2.9-GWth nuclear power reactors of the Daya Bay and Ling Ao nuclear power facilities served as intense sources of nu((e) over bar)'s. Comparison of the (v) over bare rate and energy spectrum measured by antineutrino detectors far from the nuclear reactors (similar to 1500-1950 m) relative to detectors near the reactors (similar to 350-600 m) allowed a precise measurement of (v) over bar (e) disappearance. More than 2.5 million (v) over bar (e) inverse beta-decay interactions were observed, based on the combination of 217 days of operation of six antineutrino detectors (December, 2011-July, 2012) with a subsequent 1013 days using the complete configuration of eight detectors (October, 2012-July, 2015). The (v) over bar (e) rate observed at the far detectors relative to the near detectors showed a significant deficit, R = 0.949 +/- 0.002(stat) +/- 0.002(syst). The energy dependence of (v) over bar (e) disappearance showed the distinct variation predicted by neutrino oscillation. Analysis using an approximation for the three-flavor oscillation probability yielded the flavor-mixing angle sin(2)2 theta(13) = 0.0841 +/- 0.0027(stat) +/- 0.0019(syst) and the effective neutrino mass-squared difference of broken vertical bar Delta m(ee)(2)vertical bar = (2.50 +/- 0.06(stat) +/- 0.06(syst)) x 10(-3) eV(2). Analysis using the exact three-flavor probability found Delta m(32)(2) = (2.45 +/- 0.06(stat) +/- 0.06d(syst)) x 10(-3) eV(2) assuming the normal neutrino mass hierarchy and Delta m(32)(2) = (-2.56 +/- 0.06(stat) +/- 0.06(syst)) x 10(-3) eV(2) for the inverted hierarchy.

引用

页数：46

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