Improved measurement of electron antineutrino disappearance at Daya Bay
An F. P. (鹏安丰)1, An Q. (琪安)2, Bai J. Z. (芝白景)1, Balantekin A. B.3, Band H. R.3, Beriguete W.4, Bishai M.4, Blyth S.5, Brown R. L.4, Cao G. F. (富曹国)1, Cao J. (俊曹)1, Carr R.6, Chan W. T.4, Chang J. F. (帆常劲)1, Chang Y.5, Chasman C.4, Chen H. S. (生陈和)1, Chen H. Y.7, Chen S. J. (见陈申)8, Chen S. M. (敏陈少)9, Chen X. C. (聪陈潇)10, Chen X. H. (辉陈晓)1, Chen X. S. (苏陈晓)1, Chen Y. (羽陈)11, Chen Y. X. (学陈义)12, Cherwinka J. J.3, Chu M. C. (中朱明)10, Cummings J. P.13, Deng Z. Y. (艳邓子)1, Ding Y. Y. (韵丁雅)1, Diwan M. V.4, Draeger E.14, Du X. F. (峰杜小)1, Dwyer D.6, Edwards W. R.15,16, Ely S. R.17, Fang S. D. (东方绍)8, Fu J. Y. (煜付金)1, Fu Z. W. (伟付在)8, Ge L. Q. (全葛良)18, Gill R. L.4, Gonchar M.19, Gong G. H. (华龚光)9, Gong H. (辉宫)9, Gornushkin Y. A.19, Gu W. Q. (强顾文)20, Guan M. Y. (云关梦)1, Guo X. H. (恒郭新)21, Hackenburg R. W.4, Hahn R. L.4, Hans S.4, Hao H. F. (峰郝慧)2, He M. (苗何)1, He Q. (青贺)22, Heeger K. M.3, Heng Y. K. (昆衡月)1, Hinrichs P.3, Hor Y. K.23, Hsiung Y. B.24, Hu B. Z.7, Hu T. (涛胡)1, Huang H. X. (雄黄翰)25, Huang H. Z.26, Huang X. T. (涛黄性)27, Huber P.23, Issakov V.4, Isvan Z.4, Jaffe D. E.4, Jetter S.1, Ji X. L. (璐季筱)1, Ji X. P. (盼季向)28, Jiang H. J. (静姜海)18, Jiao J. B. (斌焦健)27, Johnson R. A.29, Kang L. (丽康)30, Kettell S. H.4, Kramer M.15,16, Kwan K. K. (强关健)10, Kwok M. W. (伟郭文)10, Kwok T. (天能郭)31, Lai C. Y.24, Lai W. C. (昌赖万)18, Lai W. H.7, Lau K.32, Lebanowski L.32, Lee J.15, Lei R. T. (霆雷瑞)30, Leitner R.33, Leung J. K. C. (庄梁干)31, Leung K. Y. (怡梁嘉)31, Lewis C. A.3, Li F. (飞李)1, Li G. S. (嵩李高)20, Li Q. J. (菊李秋)1, Li W. D. (东李卫)1, Li X. B. (波李小)1, Li X. N. (男李小)1, Li X. Q. (潜李学)28, Li Y. (仪李)30, Li Z. B. (斌李志)34, Liang H. (昊梁)2, Lin C. J. (儒林政)15, Lin G. L.7, Lin S. K.32, Lin Y. C. (畅林延)10,18,31, Ling J. J. (杰凌家)4, Link J. M.23, Littenberg L.4, Littlejohn B. R.3,29, Liu D. W.17, Liu J. C. (昌刘金)1, Liu J. L. (来刘江)20, Liu Y. B. (彪刘颖)1, Lu C. (昌国陆)22, Lu H. Q. (奇路浩)1, Luk A. (永康陆)10, Luk K. B.15,16, Ma Q. M. (梅马秋)1, Ma X. B. (波马续)12, Ma X. Y. (妍马骁)1, Ma Y. Q. (蒨马宇)1, McDonald K. T.22, McFarlane M. C.3, McKeown R. D.6,35, Meng Y.23, Mohapatra D.23, Nakajima Y.15, Napolitano J.36, Naumov D.19, Nemchenok I.19, Ngai H. Y. (然倪浩)31, Ngai W. K.17, Nie Y. B. (波聂阳)25, Ning Z. (哲宁)1, Ochoa-Ricoux J. P.15, Olshevski A.19, Patton S.15, Pec V.33, Peng J. C.17, Piilonen L. E.23, Pinsky L.32, Pun C. S. J. (声潘振)31, Qi F. Z. (制齐法)1, Qi M. (鸣祁)8, Qian X. (鑫钱)6, Raper N.36, Ren J. (杰任)25, Rosero R.4, Roskovec B.33, Ruan X. C. (超阮锡)25, Shao B. B. (贝邵贝)9, Shih K. (恺师)10, Steiner H.15,16, Sun G. X. (星孙功)1, Sun J. L. (良孙吉)37, Tagg N.4, Tam Y. H. (豪谭耀)10, Tanaka H. K.4, Tang X. (晓唐)1, Themann H.4, Torun Y.14, Trentalange S.26, Tsai O.26, Tsang K. V.15, Tsang R. H. M.6, Tull C. E.15, Tung Y. C.24, Viren B.4, Vorobel V.33, Wang C. H.5, Wang L. S. (淑王灵)1, Wang L. Y. (玉王玲)1, Wang L. Z. (泽王龙)12, Wang M. (萌王)27, Wang N. Y. (彦王乃)21, Wang R. G. (光王瑞)1, Wang W.35, Wang X. (玺王)9, Wang Y. F. (芳王贻)1, Wang Z. (喆王)9, Wang Z. (铮王)1, Wang Z. M. (民王志)1, Webber D. M.3, Wei H. Y. (宇魏瀚)9, Wei Y. D. (东魏亚)30, Wen L. J. (剑温良)1, Whisnant K.38, White C. G.14, Whitehead L.32, Williamson Y.4, Wise T.3, Wong H. L. H.15,16, Worcester E. T.4, Wu F. F.6, Wu Q. (群吴)27, Xi J. B. (博习建)2, Xia D. M. (梅夏冬)1, Xing Z. Z. (忠邢志)1, Xu J. (建一徐)10, Xu J. (晶徐)21, Xu J. L. (磊徐吉)1, Xu Y. (晔徐)28, Xue T. (涛薛)9, Yang C. G. (根杨长)1, Yang L. (雷杨)30, Ye M. (梅叶)1, Yeh M.4, Yeh Y. S.7, Young B. L.38, Yu Z. Y. (源于泽)1, Zhan L. (亮占)1, Zhang C.4, Zhang F. H. (虹章飞)1, Zhang J. W. (文张家)1, Zhang Q. M. (民张清)39, Zhang S. H. (华张书)1, Zhang Y. C. (纯张一)2, Zhang Y. H. (鸿张银)1, Zhang Y. X. (心张一)37, Zhang Z. J. (坚张志)30, Zhang Z. P. (平张子)2, Zhang Z. Y. (勇张智)1, Zhao J. (洁赵)1, Zhao Q. W. (望赵庆)1, Zhao Y. B. (斌赵豫)1, Zheng L. (磊郑)2, Zhong W. L. (丽钟玮)1, Zhou L. (莉周)1, Zhou Z. Y. (英周祖)25, Zhuang H. L. (林庄红)1 and Zou J. H. (恒邹佳)1
2013 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd
Chinese Physics C,
Volume 37,
Number 1
Citation An F. P. et al 2013 Chinese Phys. C37 011001DOI 10.1088/1674-1137/37/1/011001
We report an improved measurement of the neutrino mixing angle θ13 from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for sin22θ13 with a significance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GWth were detected in six antineutrino detectors deployed in two near (flux-weighted baselines of 470 m and 576 m) and one far (1648 m) underground experimental halls. Using 139 days of data, 28909 (205308) electron antineutrino candidates were detected at the far hall (near halls). The ratio of the observed to the expected number of antineutrinos assuming no oscillations at the far hall is 0.944±0.007(stat.)±0.003(syst.). An analysis of the relative rates in six detectors finds sin22θ13=0.089±0.010(stat.)±0.005(syst.) in a three-neutrino framework.