标题:Improved measurement of electron antineutrino disappearance at Daya Bay
作者:F. P. An[1];Q.An[1];J Z. Bai[1];A. B. Balantekin[3];H. R. Band[3];W. Beriguete[4];M. Bishai[4];S. Blyth[5];R. L. Brown[4];G. F. Cao[1];J. Cao[1];R. Ca 更多
作者机构:[F. P. An;Q.An;J Z. Bai;G. F. Cao;J. Cao;J. F. Chang;H. S. Chen;X. H. Chen;X. S. Chen;Z. Y. Deng;Y. Y. Ding;X. F. Du;J. Y. Fu;M. Y. Guan;M. He;Y. K. H 更多
通讯作者:An, FP
通讯作者地址:[An, FP]Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
来源:中国物理C:英文版
出版年:2013
卷:37
期:1
页码:1-20
DOI:10.1088/1674-1137/37/1/011001
关键词:电子中微子;测量;大亚湾;中微子探测器;中微子实验;基线检测;相对速率;反应堆;
摘要:We report an improved measurement of the neutrino mixing angle θ13from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for sin2θ13with a significance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GWthwere 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 sin2θ13=0.089±0.010(stat.)±0.005(syst.) in a three-neutrino framework.
收录类别:SCOPUS;SCIE
WOS核心被引频次:219
Scopus被引频次:231
资源类型:期刊论文
原文链接:http://lib.cqvip.com/qk/92043A/201301/44722544.html
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