1. 登录 | 注册 | 用户中心 | 关于平台 | 中国科学院
当前位置:成果展示 > 成果详情

New Measurement of Antineutrino Oscillation withthe Full Detector Configuration at Daya Bay

  • [设施]:大亚湾实验
  • [期刊/会议名称]:Phys. Rev. Lett.
  • [摘要]:We report a new measurement of electron antineutrino disappearance using the fully constructed Daya Bay Reactor Neutrino Experiment. The final two of eight antineutrino detectors were installed in the summer of 2012. Including the 404 days of data collected from October 2012 to November 2013 resulted in a total exposure of 6.9 × 105 GWth ton days, a 3.6 times increase over our previous results. Improvements in energy calibration limited variations between detectors to 0.2%. Removal of six 241Am-13C radioactive calibration sources reduced the background by a factor of 2 for the detectors in the experimental hall furthest from the reactors. Direct prediction of the antineutrino signal in the far detectors based on the measurements in the near detectors explicitly minimized the dependence of the measurement on models of reactor antineutrino emission. The uncertainties in our estimates of sin22θ13 and jΔm2eej were halved as a result of these improvements. An analysis of the relative antineutrino rates and energy spectra between detectors gave sin22θ13¼ 0.084 0.005 and jΔm2 eej ¼ ð2.42 0.11Þ × 10−3 eV2 in the three-neutrino framework.
  • [发表日期]:2015
  • [第一作者]:Daya Bay Collaboration
  • [第一作者单位]:中国科学院高能物理研究所
  • [通讯作者]:Daya Bay Collaboration
  • [通讯作者单位]:中国科学院高能物理研究所
  • [论文类型]:期刊
  • [期刊分类]:
  • [学科分类]:
  • [影响因子]:7.512
  • [关键词]:
  • [卷号]:
  • [期号]:
  • [起止页码]:
  • [简介]: