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. 2012 Apr 27;108(17):171803.
doi: 10.1103/PhysRevLett.108.171803. Epub 2012 Apr 23.

Observation of electron-antineutrino disappearance at Daya Bay

F P An  1 , J Z Bai, A B Balantekin, H R Band, D Beavis, W Beriguete, M Bishai, S Blyth, K Boddy, R L Brown, B Cai, G F Cao, J Cao, R Carr, W T Chan, J F Chang, Y Chang, C Chasman, H S Chen, H Y Chen, S J Chen, S M Chen, X C Chen, X H Chen, X S Chen, Y Chen, Y X Chen, J J Cherwinka, M C Chu, J P Cummings, Z Y Deng, Y Y Ding, M V Diwan, L Dong, E Draeger, X F Du, D A Dwyer, W R Edwards, S R Ely, S D Fang, J Y Fu, Z W Fu, L Q Ge, V Ghazikhanian, R L Gill, J Goett, M Gonchar, G H Gong, H Gong, Y A Gornushkin, L S Greenler, W Q Gu, M Y Guan, X H Guo, R W Hackenburg, R L Hahn, S Hans, M He, Q He, W S He, K M Heeger, Y K Heng, P Hinrichs, T H Ho, Y K Hor, Y B Hsiung, B Z Hu, T Hu, T Hu, H X Huang, H Z Huang, P W Huang, X Huang, X T Huang, P Huber, Z Isvan, D E Jaffe, S Jetter, X L Ji, X P Ji, H J Jiang, W Q Jiang, J B Jiao, R A Johnson, L Kang, S H Kettell, M Kramer, K K Kwan, M W Kwok, T Kwok, C Y Lai, W C Lai, W H Lai, K Lau, L Lebanowski, J Lee, M K P Lee, R Leitner, J K C Leung, K Y Leung, C A Lewis, B Li, F Li, G S Li, J Li, Q J Li, S F Li, W D Li, X B Li, X N Li, X Q Li, Y Li, Z B Li, H Liang, J Liang, C J Lin, G L Lin, S K Lin, S X Lin, Y C Lin, J J Ling, J M Link, L Littenberg, B R Littlejohn, B J Liu, C Liu, D W Liu, H Liu, J C Liu, J L Liu, S Liu, X Liu, Y B Liu, C Lu, H Q Lu, A Luk, K B Luk, T Luo, X L Luo, L H Ma, Q M Ma, X B Ma, X Y Ma, Y Q Ma, B Mayes, K T McDonald, M C McFarlane, R D McKeown, Y Meng, D Mohapatra, J E Morgan, Y Nakajima, J Napolitano, D Naumov, I Nemchenok, C Newsom, H Y Ngai, W K Ngai, Y B Nie, Z Ning, J P Ochoa-Ricoux, D Oh, A Olshevski, A Pagac, S Patton, C Pearson, V Pec, J C Peng, L E Piilonen, L Pinsky, C S J Pun, F Z Qi, M Qi, X Qian, N Raper, R Rosero, B Roskovec, X C Ruan, B Seilhan, B B Shao, K Shih, H Steiner, P Stoler, G X Sun, J L Sun, Y H Tam, H K Tanaka, X Tang, H Themann, Y Torun, S Trentalange, O Tsai, K V Tsang, R H M Tsang, C Tull, B Viren, S Virostek, V Vorobel, C H Wang, L S Wang, L Y Wang, L Z Wang, M Wang, N Y Wang, R G Wang, T Wang, W Wang, X Wang, X Wang, Y F Wang, Z Wang, Z Wang, Z M Wang, D M Webber, Y D Wei, L J Wen, D L Wenman, K Whisnant, C G White, L Whitehead, C A Whitten Jr, J Wilhelmi, T Wise, H C Wong, H L H Wong, J Wong, E T Worcester, F F Wu, Q Wu, D M Xia, S T Xiang, Q Xiao, Z Z Xing, G Xu, J Xu, J Xu, J L Xu, W Xu, Y Xu, T Xue, C G Yang, L Yang, M Ye, M Yeh, Y S Yeh, K Yip, B L Young, Z Y Yu, L Zhan, C Zhang, F H Zhang, J W Zhang, Q M Zhang, K Zhang, Q X Zhang, S H Zhang, Y C Zhang, Y H Zhang, Y X Zhang, Z J Zhang, Z P Zhang, Z Y Zhang, J Zhao, Q W Zhao, Y B Zhao, L Zheng, W L Zhong, L Zhou, Z Y Zhou, H L Zhuang, J H Zou
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Free article

Observation of electron-antineutrino disappearance at Daya Bay

F P An et al. Phys Rev Lett. .
Free article

Abstract

The Daya Bay Reactor Neutrino Experiment has measured a nonzero value for the neutrino mixing angle θ(13) with a significance of 5.2 standard deviations. Antineutrinos from six 2.9 GWth reactors were detected in six antineutrino detectors deployed in two near (flux-weighted baseline 470 m and 576 m) and one far (1648 m) underground experimental halls. With a 43,000 ton-GWth-day live-time exposure in 55 days, 10,416 (80,376) electron-antineutrino candidates were detected at the far hall (near halls). The ratio of the observed to expected number of antineutrinos at the far hall is R=0.940±0.011(stat.)±0.004(syst.). A rate-only analysis finds sin(2)2θ(13)=0.092±0.016(stat.)±0.005(syst.) in a three-neutrino framework.

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