Observation of Electron-Antineutrino Disappearance at Daya Bay

作者：An F P^*; Bai J Z; Balantekin A B; Band H R; Beavis D; Beriguete W; Bishai M; Blyth S; Boddy K; Brown R L; Cai B; Cao G F; Cao J; Carr R; Chan W T; Chang J F; Chang Y; Chasman C; Chen 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; Cherwinka J J; Chu M C; Cummings J P; Deng Z Y; Ding Y Y; Diwan M V; Dong L; Draeger E; Du X F; Dwyer D A; Edwards W R; Ely S R

来源：Physical Review Letters, 2012, 108(17): 171803.

DOI：10.1103/PhysRevLett.108.171803

The Daya Bay Reactor Neutrino Experiment has measured a nonzero value for the neutrino mixing angle 0(13) with a significance of 5.2 standard deviations. Antineutrinos from six 2.9 GW(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 a 43 000 ton-GW(th)-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)2 theta(13) = 0.092 +/- 0.016(stat.) +/- 0.005(syst.) in a three-neutrino framework.

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  南京大学; 东莞理工学院; 中国原子能科学研究院; 香港中文大学; 北京师范大学; 清华大学; shenzhen univ; 香港大学; 成都理工大学; 上海交通大学; 中山大学; 山东大学; 华北电力大学; 南开大学