Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector

doi:10.1103/PhysRevLett.120.072701

	Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector
	EXO-200 Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2018
卷号	120 期号:7 页码:72701
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.120.072701
文献子类	Article
英文摘要	Results from a search for neutrinoless double-beta decay (0 nu beta beta) of Xe-136 are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detector has been improved to sigma/E = 1.23%, the electric field in the drift region has been raised by 50%, and a system to suppress radon in the volume between the cryostat and lead shielding has been implemented. In addition, analysis techniques that improve topological discrimination between 0 nu beta beta and background events have been developed. Incorporating these hardware and analysis improvements, the median 90% confidence level 0 nu beta beta half-life sensitivity after combining with the full data set acquired before the upgrade has increased twofold to 3.7 x 10(25) yr. No statistically significant evidence for 0 nu beta beta is observed, leading to a lower limit on the 0 nu beta beta half-life of 1.8 x 10(25) yr at the 90% confidence level.
电子版国际标准刊号	1079-7114
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000425094600001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285643]
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	EXO-200 Collaboration. Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector[J]. PHYSICAL REVIEW LETTERS,2018,120(7):72701.
APA	EXO-200 Collaboration.(2018).Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector.PHYSICAL REVIEW LETTERS,120(7),72701.
MLA	EXO-200 Collaboration."Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector".PHYSICAL REVIEW LETTERS 120.7(2018):72701.