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New Measurement of Antineutrino Oscillation with the Full Detector Configuration at Daya Bay
Daya Bay Collaboration
2015
发表期刊PHYSICAL REVIEW LETTERS
卷号115页码:111802
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 x 10(5) GW(th) 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 Am-241-C-13 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 sin(2)2 theta(13) and vertical bar Delta m(ee)(2)vertical bar were halved as a result of these improvements. An analysis of the relative antineutrino rates and energy spectra between detectors gave sin(2)2 theta(13) = 0.084 +/- 0.005 and vertical bar Delta m(ee)(2)vertical bar = (2.42 +/- 0.11) x 10(-3) eV(2) in the three-neutrino framework.
文章类型Article
学科领域Physics
DOI10.1103/PhysRevLett.115.111802
收录类别SCI ; EI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000361040800001
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被引频次:77[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228737
专题实验物理中心
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Daya Bay Collaboration. New Measurement of Antineutrino Oscillation with the Full Detector Configuration at Daya Bay[J]. PHYSICAL REVIEW LETTERS,2015,115:111802.
APA Daya Bay Collaboration.(2015).New Measurement of Antineutrino Oscillation with the Full Detector Configuration at Daya Bay.PHYSICAL REVIEW LETTERS,115,111802.
MLA Daya Bay Collaboration."New Measurement of Antineutrino Oscillation with the Full Detector Configuration at Daya Bay".PHYSICAL REVIEW LETTERS 115(2015):111802.
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