/ Experiment-HEP arXiv:1203.1669


Observation of electron-antineutrino disappearance at Daya Bay


An, F.P. (Beijing, Inst. High Energy Phys.) ; Bai, J.Z. (Beijing, Inst. High Energy Phys.) ; Balantekin, A.B. (Wisconsin U., Madison) ; Band, H.R. (Wisconsin U., Madison) ; Beavis, D. (Brookhaven) ; Beriguete, W. (Brookhaven) ; Bishai, M. (Brookhaven) ; Blyth, S. (Natl. United U., Taiwan) ; Brown, R.L. (Brookhaven) ; Cao, G.F. (Beijing, Inst. High Energy Phys.) ; Cao, J. (Beijing, Inst. High Energy Phys.) ; Carr, R. (Caltech) ; Chan, W.T. (Brookhaven) ; Chang, J.F. (Beijing, Inst. High Energy Phys.) ; Chang, Y. (Natl. United U., Taiwan) ; Chasman, C. (Brookhaven) ; Chen, H.S. (Beijing, Inst. High Energy Phys.) ; Chen, H.Y. (Taiwan, Natl. Chiao Tung U.) ; Chen, S.J. (Nanjing U.) ; Chen, S.M. (Tsinghua U., Beijing) ; Chen, X.C. (Hong Kong, Chinese U.) ; Chen, X.H. (Beijing, Inst. High Energy Phys.) ; Chen, X.S. (Beijing, Inst. High Energy Phys.) ; Chen, Y. (Shenzhen U.) ; Chen, Y.X. (Beijing, North China Elec. Power U.) ; Cherwinka, J.J. (Wisconsin U., Madison) ; Chu, M.C. (Hong Kong, Chinese U.) ; Cummings, J.P. (Siena Coll., Loudonville) ; Deng, Z.Y. (Beijing, Inst. High Energy Phys.) ; Ding, Y.Y. (Beijing, Inst. High Energy Phys.) ; Diwan, M.V. (Brookhaven) ; Dong, L. (Beijing, Inst. High Energy Phys.) ; Draeger, E. (IIT, Chicago) ; Du, X.F. (Beijing, Inst. High Energy Phys.) ; Dwyer, D.A. (Caltech) ; Edwards, W.R. (LBL, Berkeley) ; Ely, S.R. (Illinois U., Urbana) ; Fang, S.D. (Nanjing U.) ; Fu, J.Y. (Beijing, Inst. High Energy Phys.) ; Fu, Z.W. (Nanjing U.) ; Ge, L.Q. (Chengdu U. Of Tech.) ; Ghazikhanian, V. (UCLA) ; Gill, R.L. (Brookhaven) ; Goett, J. (Rensselaer Poly.) ; Gonchar, M. (Dubna, JINR) ; Gong, G.H. (Tsinghua U., Beijing) ; Gong, H. (Tsinghua U., Beijing) ; Gornushkin, Y.A. (Dubna, JINR) ; Greenler, L.S. (Wisconsin U., Madison) ; Gu, W.Q. (Shanghai, Jiao Tong U.) ; Guan, M.Y. (Beijing, Inst. High Energy Phys.) ; Guo, X.H. (Beijing Normal U.) ; Hackenburg, R.W. (Brookhaven) ; Hahn, R.L. (Brookhaven) ; Hans, S. (Brookhaven) ; He, M. (Beijing, Inst. High Energy Phys.) ; He, Q. (Princeton U.) ; He, W.S. (Taiwan, Natl. Taiwan U.) ; Heeger, K.M. (Wisconsin U., Madison) ; Heng, Y.K. (Beijing, Inst. High Energy Phys.) ; Hinrichs, P. (Wisconsin U., Madison) ; Ho, T.H. (Taiwan, Natl. Taiwan U.) ; Hor, Y.K. (Virginia Tech.) ; Hsiung, Y.B. (Taiwan, Natl. Taiwan U.) ; Hu, B.Z. (Taiwan, Natl. Chiao Tung U.) ; Hu, T. (Beijing, Inst. High Energy Phys.) ; Hu, T. (Beijing Normal U.) ; Huang, H.X. (Beijing, Inst. Atomic Energy) ; Huang, H.Z. (UCLA) ; Huang, P.W. (Nanjing U.) ; Huang, X. (Houston U.) ; Huang, X.T. (Shandong U.) ; Huber, P. (Virginia Tech.) ; Isvan, Z. (Brookhaven) ; Jaffe, D.E. (Brookhaven) ; Jetter, S. (Beijing, Inst. High Energy Phys.) ; Ji, X.L. (Beijing, Inst. High Energy Phys.) ; Ji, X.P. (Nankai U.) ; Jiang, H.J. (Chengdu U. Of Tech.) ; Jiang, W.Q. (Beijing, Inst. High Energy Phys.) ; Jiao, J.B. (Shandong U.) ; Johnson, R.A. (Xavier U.) ; Kang, L. (DongGuan U. Technol.) ; Kettell, S.H. (Brookhaven) ; Kramer, M. (UC, Berkeley) ; Kwan, K.K. (Hong Kong, Chinese U.) ; Kwok, M.W. (Hong Kong, Chinese U.) ; Kwok, T. (Hong Kong U.) ; Lai, C.Y. (Taiwan, Natl. Taiwan U.) ; Lai, W.C. (Chengdu U. Of Tech.) ; Lai, W.H. (Taiwan, Natl. Chiao Tung U.) ; Lau, K. (Houston U.) ; Lebanowski, L. (Houston U.) ; Lee, J. (LBL, Berkeley) ; Lee, M.K.P. (Hong Kong U.) ; Leitner, R. (Charles U.) ; Leung, J.K.C. (Hong Kong U.) ; Leung, K.Y. (Hong Kong U.) ; Lewis, C.A. (Wisconsin U., Madison) ; Li, B. (Beijing, Inst. High Energy Phys.) ; Li, F. (Beijing, Inst. High Energy Phys.) ; Li, G.S. (Shanghai, Jiao Tong U.) ; Li, J. (Beijing, Inst. High Energy Phys.) ; Li, Q.J. (Beijing, Inst. High Energy Phys.) ; Li, S.F. (DongGuan U. Technol.) ; Li, W.D. (Beijing, Inst. High Energy Phys.) ; Li, X.B. (Beijing, Inst. High Energy Phys.) ; Li, X.N. (Beijing, Inst. High Energy Phys.) ; Li, X.Q. (Nankai U.) ; Li, Y. (DongGuan U. Technol.) ; Li, Z.B. (Zhongshan U.) ; Liang, H. (Hefei, CUST) ; Liang, J. (Beijing, Inst. High Energy Phys.) ; Lin, C.J. (LBL, Berkeley) ; Lin, G.L. (Taiwan, Natl. Chiao Tung U.) ; Lin, S.K. (Houston U.) ; Lin, S.X. (DongGuan U. Technol.) ; Lin, Y.C. (Tsinghua U., Beijing) ; Ling, J.J. (Brookhaven) ; Link, J.M. (Virginia Tech.) ; Littenberg, L. (Brookhaven) ; Littlejohn, B.R. (Wisconsin U., Madison) ; Liu, B.J. (Hong Kong U.) ; Liu, C. (Beijing, Inst. High Energy Phys.) ; Liu, D.W. (Illinois U., Urbana) ; Liu, H. (Hong Kong U.) ; Liu, J.C. (Beijing, Inst. High Energy Phys.) ; Liu, J.L. (Shanghai, Jiao Tong U.) ; Liu, S. (LBL, Berkeley) ; Liu, X. (Beijing, Inst. High Energy Phys.) ; Liu, Y.B. (Beijing, Inst. High Energy Phys.) ; Lu, C. (Princeton U.) ; Lu, H.Q. (Beijing, Inst. High Energy Phys.) ; Luk, A. (Hong Kong, Chinese U.) ; Luk, K.B. (UC, Berkeley) ; Luo, T. (Beijing, Inst. High Energy Phys.) ; Luo, X.L. (Beijing, Inst. High Energy Phys.) ; Ma, L.H. (Beijing, Inst. High Energy Phys.) ; Ma, Q.M. (Beijing, Inst. High Energy Phys.) ; Ma, X.B. (Beijing, North China Elec. Power U.) ; Ma, X.Y. (Beijing, Inst. High Energy Phys.) ; Ma, Y.Q. (Beijing, Inst. High Energy Phys.) ; Mayes, B. (Houston U.) ; McDonald, K.T. (Princeton U.) ; McFarlane, M.C. (Wisconsin U., Madison) ; McKeown, R.D. (William-Mary Coll.) ; Meng, Y. (Virginia Tech.) ; Mohapatra, D. (Virginia Tech.) ; Morgan, J.E. (Virginia Tech.) ; Nakajima, Y. (LBL, Berkeley) ; Napolitano, J. (Rensselaer Poly.) ; Naumov, D. (Dubna, JINR) ; Nemchenok, I. (Dubna, JINR) ; Newsom, C. (Houston U.) ; Ngai, H.Y. (Hong Kong U.) ; Ngai, W.K. (Illinois U., Urbana) ; Nie, Y.B. (Beijing, Inst. Atomic Energy) ; Ning, Z. (Beijing, Inst. High Energy Phys.) ; Ochoa-Ricoux, J.P. (LBL, Berkeley) ; Olshevski, A. (Dubna, JINR) ; Pagac, A. (Wisconsin U., Madison) ; Patton, S. (LBL, Berkeley) ; Pearson, C. (Brookhaven) ; Pec, V. (Charles U.) ; Peng, J.C. (Illinois U., Urbana) ; Piilonen, L.E. (Virginia Tech.) ; Pinsky, L. (Houston U.) ; Pun, C.S.J. (Hong Kong U.) ; Qi, F.Z. (Beijing, Inst. High Energy Phys.) ; Qi, M. (Nanjing U.) ; Qian, X. (Caltech) ; Raper, N. (Rensselaer Poly.) ; Rosero, R. (Brookhaven) ; Roskovec, B. (Charles U.) ; Ruan, X.C. (Beijing, Inst. Atomic Energy) ; Seilhan, B. (IIT, Chicago) ; Shao, B.B. (Tsinghua U., Beijing) ; Shih, K. (Hong Kong, Chinese U.) ; Steiner, H. (UC, Berkeley) ; Stoler, P. (Rensselaer Poly.) ; Sun, G.X. (Beijing, Inst. High Energy Phys.) ; Sun, J.L. (CGNPC, Shenzhen) ; Tam, Y.H. (Hong Kong, Chinese U.) ; Tanaka, H.K. (Brookhaven) ; Tang, X. (Beijing, Inst. High Energy Phys.) ; Themann, H. (Brookhaven) ; Torun, Y. (IIT, Chicago) ; Trentalange, S. (UCLA) ; Tsai, O. (UCLA) ; Tsang, K.V. (LBL, Berkeley) ; Tsang, R.H.M. (Caltech) ; Tull, C. (LBL, Berkeley) ; Viren, B. (Brookhaven) ; Virostek, S. (LBL, Berkeley) ; Vorobel, V. (Charles U.) ; Wang, C.H. (Natl. United U., Taiwan) ; Wang, L.S. (Beijing, Inst. High Energy Phys.) ; Wang, L.Y. (Beijing, Inst. High Energy Phys.) ; Wang, L.Z. (Beijing, North China Elec. Power U.) ; Wang, M. (Beijing, Inst. High Energy Phys.) ; Wang, N.Y. (Beijing Normal U.) ; Wang, R.G. (Beijing, Inst. High Energy Phys.) ; Wang, T. (Beijing, Inst. High Energy Phys.) ; Wang, W. (Caltech) ; Wang, X. (Tsinghua U., Beijing) ; Wang, X. (Beijing, Inst. High Energy Phys.) ; Wang, Y.F. (Beijing, Inst. High Energy Phys.) ; Wang, Z. (Brookhaven) ; Wang, Z. (Beijing, Inst. High Energy Phys.) ; Wang, Z.M. (Beijing, Inst. High Energy Phys.) ; Webber, D.M. (Wisconsin U., Madison) ; Wei, Y.D. (DongGuan U. Technol.) ; Wen, L.J. (Beijing, Inst. High Energy Phys.) ; Wenman, D.L. (Wisconsin U., Madison) ; Whisnant, K. (Iowa State U.) ; White, C.G. (IIT, Chicago) ; Whitehead, L. (Houston U.) ; Whitten, C.A., Jr. (UCLA) ; Wilhelmi, J. (Rensselaer Poly.) ; Wise, T. (Wisconsin U., Madison) ; Wong, H.C. (Hong Kong U.) ; Wong, H.L.H. (UC, Berkeley) ; Wong, J. (Hong Kong, Chinese U.) ; Worcester, E.T. (Brookhaven) ; Wu, F.F. (Caltech) ; Wu, Q. (IIT, Chicago) ; Xia, D.M. (Beijing, Inst. High Energy Phys.) ; Xiang, S.T. (Hefei, CUST) ; Xiao, Q. (Wisconsin U., Madison) ; Xing, Z.Z. (Beijing, Inst. High Energy Phys.) ; Xu, G. (Houston U.) ; Xu, J. (Hong Kong, Chinese U.) ; Xu, J. (Beijing Normal U.) ; Xu, J.L. (Beijing, Inst. High Energy Phys.) ; Xu, W. (UCLA) ; Xu, Y. (Nankai U.) ; Xue, T. (Tsinghua U., Beijing) ; Yang, C.G. (Beijing, Inst. High Energy Phys.) ; Yang, L. (DongGuan U. Technol.) ; Ye, M. (Beijing, Inst. High Energy Phys.) ; Yeh, M. (Brookhaven) ; Yeh, Y.S. (Taiwan, Natl. Chiao Tung U.) ; Yip, K. (Brookhaven) ; Young, B.L. (Iowa State U.) ; Yu, Z.Y. (Beijing, Inst. High Energy Phys.) ; Zhan, L. (Beijing, Inst. High Energy Phys.) ; Zhang, C. (Brookhaven) ; Zhang, F.H. (Beijing, Inst. High Energy Phys.) ; Zhang, J.W. (Beijing, Inst. High Energy Phys.) ; Zhang, Q.M. (Beijing, Inst. High Energy Phys.) ; Zhang, K. (Brookhaven) ; Zhang, Q.X. (Chengdu U. Of Tech.) ; Zhang, S.H. (Beijing, Inst. High Energy Phys.) ; Zhang, Y.C. (Hefei, CUST) ; Zhang, Y.H. (Beijing, Inst. High Energy Phys.) ; Zhang, Y.X. (CGNPC, Shenzhen) ; Zhang, Z.J. (DongGuan U. Technol.) ; Zhang, Z.P. (Hefei, CUST) ; Zhang, Z.Y. (Beijing, Inst. High Energy Phys.) ; Zhao, J. (Beijing, Inst. High Energy Phys.) ; Zhao, Q.W. (Beijing, Inst. High Energy Phys.) ; Zhao, Y.B. (Beijing, Inst. High Energy Phys.) ; Zheng, L. (Hefei, CUST) ; Zhong, W.L. (LBL, Berkeley) ; Zhou, L. (Beijing, Inst. High Energy Phys.) ; Zhou, Z.Y. (Beijing, Inst. Atomic Energy) ; Zhuang, H.L. (Beijing, Inst. High Energy Phys.) ; Zou, J.H. (Beijing, Inst. High Energy Phys.)

Abstract: The Daya Bay Reactor Neutrino Experiment has measured a non-zero value for the neutrino mixing angle $\theta_{13}$ with a significance of 5.2 standard deviations. Antineutrinos from six 2.9 GW$_{\rm th}$ 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 55 days of data, 10416 (80376) 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 $R=0.940\pm 0.011({\rm stat}) \pm 0.004({\rm syst})$. A rate-only analysis finds $\sin^22\theta_{13}=0.092\pm 0.016({\rm stat})\pm0.005({\rm syst})$ in a three-neutrino framework.

Keyword(s): neutrino oscillation ; neutrino mixing ; reactor ; Daya Bay

Web-Page: http://www.interactions.org/cms/?pid=1031513; http://news.sciencemag.org/sciencenow/2012/03/physicists-in-china-nail-a-key.html?ref=hp; 2012/03/08; http://inspirehep.net/record/1093266/files/arXiv:1203.1669.pdf; http://inspirehep.net/record/1093266/files/Fig1_DYB_layout_prl.png; http://inspirehep.net/record/1093266/files/Fig2_DYB_detector.png; http://inspirehep.net/record/1093266/files/Fig3_DYB_all_site_rate.png; http://inspirehep.net/record/1093266/files/Fig4_DYB_oscillation.png; http://inspirehep.net/record/1093266/files/Fig5_DYB_spectrum_deficit.png


Note: 5 figures

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