Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay

doi:10.1103/PhysRevLett.121.241805

	Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay
	Daya Bay Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2018
卷号	121 期号:24 页码:241805
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.121.241805
文献子类	Article
英文摘要	We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor (nu) over bar (e) inverse beta decay candidates observed over 1958 days of data collection. The installation of a flash analog-to-digital converter readout system and a special calibration campaign using different source enclosures reduce uncertainties in the absolute energy calibration to less than 0.5% for visible energies larger than 2 MeV. The uncertainty in the cosmogenic Li-9 and He-8 background is reduced from 45% to 30% in the near detectors. A detailed investigation of the spent nuclear fuel history improves its uncertainty from 100% to 30%. Analysis of the relative (nu) over bar (e) rates and energy spectra among detectors yields sin(2)2 theta(13) = 0.0856 +/- 0.0029 and Delta m(32)(2) = (2.471(-0.070)(+0.068)) x 10(-3) eV(2) assuming the normal hierarchy, and Delta m(32)(2) = -(2.575(-0.070)(+0.068)) x 10(-3) eV(2) assuming the inverted hierarchy.
电子版国际标准刊号	1079-7114
WOS关键词	SYSTEM
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000453476900005
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286942]
专题	高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Daya Bay Collaboration. Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay[J]. PHYSICAL REVIEW LETTERS,2018,121(24):241805.
APA	Daya Bay Collaboration.(2018).Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay.PHYSICAL REVIEW LETTERS,121(24),241805.
MLA	Daya Bay Collaboration."Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay".PHYSICAL REVIEW LETTERS 121.24(2018):241805.