Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment

doi:10.1103/PhysRevD.95.072006

	Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment
	Daya Bay Collaboration
刊名	PHYSICAL REVIEW D
	2017
卷号	95 期号:7 页码:72006
ISSN号	2470-0010
DOI	10.1103/PhysRevD.95.072006
文献子类	Article
英文摘要	A measurement of electron antineutrino oscillation by the Daya Bay Reactor Neutrino Experiment is described in detail. Six 2.9-GWth nuclear power reactors of the Daya Bay and Ling Ao nuclear power facilities served as intense sources of nu((e) over bar)'s. Comparison of the (v) over bare rate and energy spectrum measured by antineutrino detectors far from the nuclear reactors (similar to 1500-1950 m) relative to detectors near the reactors (similar to 350-600 m) allowed a precise measurement of (v) over bar (e) disappearance. More than 2.5 million (v) over bar (e) inverse beta-decay interactions were observed, based on the combination of 217 days of operation of six antineutrino detectors (December, 2011-July, 2012) with a subsequent 1013 days using the complete configuration of eight detectors (October, 2012-July, 2015). The (v) over bar (e) rate observed at the far detectors relative to the near detectors showed a significant deficit, R = 0.949 +/- 0.002(stat) +/- 0.002(syst). The energy dependence of (v) over bar (e) disappearance showed the distinct variation predicted by neutrino oscillation. Analysis using an approximation for the three-flavor oscillation probability yielded the flavor-mixing angle sin(2)2 theta(13) = 0.0841 +/- 0.0027(stat) +/- 0.0019(syst) and the effective neutrino mass-squared difference of broken vertical bar Delta m(ee)(2)vertical bar = (2.50 +/- 0.06(stat) +/- 0.06(syst)) x 10(-3) eV(2). Analysis using the exact three-flavor probability found Delta m(32)(2) = (2.45 +/- 0.06(stat) +/- 0.06d(syst)) x 10(-3) eV(2) assuming the normal neutrino mass hierarchy and Delta m(32)(2) = (-2.56 +/- 0.06(stat) +/- 0.06(syst)) x 10(-3) eV(2) for the inverted hierarchy.
电子版国际标准刊号	2470-0029
WOS关键词	REACTOR NEUTRINO EXPERIMENT ; FLUX ; CALIBRATION ; SYSTEM ; DETECTORS ; LIBRARY ; DECAY ; LI-9
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000399391000003
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284347]
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 electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment[J]. PHYSICAL REVIEW D,2017,95(7):72006.
APA	Daya Bay Collaboration.(2017).Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment.PHYSICAL REVIEW D,95(7),72006.
MLA	Daya Bay Collaboration."Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment".PHYSICAL REVIEW D 95.7(2017):72006.