title: Improved Search for a Light Sterile Neutrino with the Full Configuration of the Daya Bay Experiment.
abstract: This Letter reports an improved search for light sterile neutrino mixing in the electron antineutrino disappearance channel with the full configuration of the Daya Bay Reactor Neutrino Experiment. With an additional 404 days of data collected in eight antineutrino detectors, this search benefits from 3.6 times the statistics available to the previous publication, as well as from improvements in energy calibration and background reduction. A relative comparison of the rate and energy spectrum of reactor antineutrinos in the three experimental halls yields no evidence of sterile neutrino mixing in the 2×10^{-4}≲|Δm_{41}^{2}|≲0.3  eV^{2} mass range. The resulting limits on sin^{2}2θ_{14} are improved by approx imately a factor of 2 over previous results and constitute the most stringent constraints to date in the |Δm_{41}^{2}|≲0.2  eV^{2} region.
authors: Institute of Modern Physics, East China University of Science and Technology, Shanghai.
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authors: FP
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authors: University of Wisconsin, Madison, Wisconsin USA.
authors: A B
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authors: Balantekin
authors: Department of Physics, Yale University, New Haven, Connecticut USA.
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authors: Brookhaven National Laboratory, Upton, New York USA.
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authors: Institute of High Energy Physics, Beijing.
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authors: Institute of High Energy Physics, Beijing.
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authors: Shandong University, Jinan.
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authors: Department of Engineering Physics, Tsinghua University, Beijing.
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authors: Institute of High Energy Physics, Beijing.
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authors: Sun Yat-Sen (Zhongshan) University, Guangzhou.|College of William and Mary, Williamsburg, Virginia USA.
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authors: College of Electronic Science and Engineering, National University of Defense Technology, Changsha.
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authors: Institute of High Energy Physics, Beijing.
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authors: Department of Engineering Physics, Tsinghua University, Beijing.
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authors: Institute of High Energy Physics, Beijing.
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authors: Department of Engineering Physics, Tsinghua University, Beijing.
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authors: Department of Physics, University of Houston, Houston, Texas USA.
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authors: Dongguan University of Technology, Dongguan.
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authors: Institute of High Energy Physics, Beijing.
authors: Z Y
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authors: Zhang
authors: University of Science and Technology of China, Hefei.
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authors: Zhang
authors: Institute of High Energy Physics, Beijing.
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authors: Institute of High Energy Physics, Beijing.
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authors: Zhao
authors: Institute of High Energy Physics, Beijing.
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authors: Zhao
authors: Institute of High Energy Physics, Beijing.
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authors: Institute of High Energy Physics, Beijing.
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authors: University of Science and Technology of China, Hefei.
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authors: Institute of High Energy Physics, Beijing.
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authors: Zhuang
authors: Institute of High Energy Physics, Beijing.
authors: J H
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authors: Zou