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Improved Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay

  • [设施]:大亚湾实验
  • [期刊/会议名称]:Chinese Physics C
  • [摘要]:We report an improved measurement of the neutrino mixing angle 13 from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for sin22 13 with a signi cance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GWth were detected in six antineutrino detectors deployed in two near ( ux- 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 nds sin22 13=0:089 0:010(stat:) 0:005(syst:) in a three-neutrino framework.
  • [发表日期]:2017
  • [第一作者]:Daya Bay Collaboration
  • [第一作者单位]:中科院高能所
  • [通讯作者]:Daya Bay Collaboration
  • [通讯作者单位]:中科院高能所
  • [论文类型]:期刊
  • [期刊分类]:
  • [学科分类]:
  • [影响因子]:1.313
  • [关键词]:neutrino oscillation, neutrino mixing, reactor, Daya Bay
  • [卷号]:13002
  • [期号]:41
  • [起止页码]:
  • [简介]: