|
|||||
|
|
Observation of electron-antineutrino disappearance at Daya Bay |
|
| Authors: | 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 Fang S D Fu J Y Fu Z W Ge L Q Ghazikhanian V Gill R L Goett J Gonchar M Gong G H Gong H Gornushkin Y A Greenler L S Gu W Q Guan M Y Guo X H Hackenburg R W Hahn R L Hans S He M He Q He W S Heeger K M Heng Y K Hinrichs P Ho T H Hor Y K Hsiung Y B |
| Institution: | Institute of High Energy Physics, Beijing, China. |
| 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. |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ | |