/ Experiment-HEP arXiv:1210.6327


Improved Measurement 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) ; 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) ; Dwyer, D. (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.) ; Gill, R.L. (Brookhaven) ; 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.) ; Heeger, K.M. (Wisconsin U., Madison) ; Heng, Y.K. (Beijing, Inst. High Energy Phys.) ; Hinrichs, P. (Wisconsin U., Madison) ; 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.) ; Huang, H.X. (Beijing, Inst. Atomic Energy) ; Huang, H.Z. (UCLA) ; Huang, X.T. (Shandong U.) ; Huber, P. (Virginia Tech.) ; Issakov, V. (Brookhaven) ; 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. (Cincinnati 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) ; 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. (Hong Kong U.) ; Ling, J.J. (Brookhaven) ; Link, J.M. (Virginia Tech.) ; Littenberg, L. (Brookhaven) ; Littlejohn, B.R. (Cincinnati U.) ; Liu, B.J. (Hong Kong U.) ; Liu, D.W. (Illinois U., Urbana) ; Liu, J.C. (Beijing, Inst. High Energy Phys.) ; Liu, J.L. (Shanghai, Jiao Tong U.) ; Liu, S. (LBL, Berkeley) ; 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, 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.) ; 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) ; 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) ; 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) ; 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.) ; Tagg, N. (Brookhaven) ; 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) ; Tung, Y.C. (Taiwan, Natl. Taiwan U.) ; 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. (Shandong U.) ; Wang, N.Y. (Beijing Normal U.) ; Wang, R.G. (Beijing, Inst. High Energy Phys.) ; Wang, T. (Beijing, Inst. High Energy Phys.) ; Wang, W. (William-Mary Coll.) ; Wang, X. (Tsinghua U., Beijing) ; Wang, X. (Beijing, Inst. High Energy Phys.) ; Wang, Y.F. (Beijing, Inst. High Energy Phys.) ; Wang, Z. (Tsinghua U., Beijing) ; 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.) ; Wilhelmi, J. (Rensselaer Poly.) ; Williamson, Y. (Brookhaven) ; Wise, T. (Wisconsin U., Madison) ; Wong, H.L.H. (UC, Berkeley) ; Wong, J. (Hong Kong, Chinese U.) ; Worcester, E.T. (Brookhaven) ; Wu, F.F. (Caltech) ; Wu, Q. (Shandong U.) ; 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, 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.) ; 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, 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. (Beijing, Inst. High Energy Phys.) ; 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.)

Pages: 20

Abstract: We report an improved measurement of the neutrino mixing angle $\theta_{13}$ from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for $\sin^22\theta_{13}$ with a significance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GW$_{\rm th}$ 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 $0.944\pm 0.007({\rm stat.}) \pm 0.003({\rm syst.})$. An analysis of the relative rates in six detectors finds $\sin^22\theta_{13}=0.089\pm 0.010({\rm stat.})\pm0.005({\rm syst.})$ in a three-neutrino framework.

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

Web-Page: http://inspirehep.net/record/1192924/files/arXiv:1210.6327.pdf


Note: 20 pages, 24 figures

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