Physics potential of searching for 0 nu beta beta decays in JUNO

doi:10.1088/1674-1137/41/5/053001

	Physics potential of searching for 0 nu beta beta decays in JUNO
	Zhao J(赵洁); Wen LJ(温良剑); Wang YF(王贻芳); Cao J(曹俊); Zhao, J; Wen, LJ; Wang, YF; Cao, J
刊名	CHINESE PHYSICS C中国物理. C
	2017
卷号	41 期号:5 页码:53001
关键词	double beta decay liquid scintillator JUNO
ISSN号	1674-1137
DOI	10.1088/1674-1137/41/5/053001
文献子类	Article
英文摘要	In the past few decades, numerous searches have been made for the neutrinoless double-beta decay (0 nu beta beta) process, aiming to establish whether neutrinos are their own antiparticles (Majorana neutrinos), but no 0 nu beta beta decay signal has yet been observed. A number of new experiments are proposed but they ultimately suffer from a common problem: the sensitivity may not increase indefinitely with the target mass. We have performed a detailed analysis of the physics potential by using the Jiangmen Underground Neutrino Observatory (JUNO) to improve the sensitivity to 0 nu beta beta up to a few meV, a major step forward with respect to the experiments currently being planned. JUNO is a 20 kton low-background liquid scintillator (LS) detector with 3%/root E(MeV) energy resolution, now under construction. It is feasible to build a balloon filled with enriched xenon gas (with Xe-138 up to 80%) dissolved in LS, inserted into the central region of the JUNO LS. The energy resolution is similar to 1.9% at the Q-value of 138Xe 0 nu beta beta decay. Ultra-low background is the key for 0 nu beta beta (3 decay searches. Detailed studies of background rates from intrinsic 2 nu beta beta and B-8 solar neutrinos, natural radioactivity, and cosmogenic radionuclides (including light isotopes and Xe-137) were performed and several muon veto schemes were developed. We find that JUNO has the potential to reach a sensitivity (at 90% C. L.) to T-1/2(0 nu beta beta) of 1.8 x 10(28) yr (5.6 x 10(27) yr) with similar to 50 tons (5 tons) of fiducial Xe-136 and 5 years exposure, while in the 50-ton case the corresponding sensitivity to the effective neutrino mass, m(beta beta), could reach (5-12) meV, covering completely the allowed region of inverted neutrino mass ordering.
WOS关键词	LOADED LIQUID SCINTILLATOR ; BETA-DECAY ; NEUTRINOS
WOS研究方向	Physics
语种	英语
CSCD记录号	CSCD:5980531
WOS记录号	WOS:000403191200002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284355]
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	Zhao J,Wen LJ,Wang YF,et al. Physics potential of searching for 0 nu beta beta decays in JUNO[J]. CHINESE PHYSICS C中国物理. C,2017,41(5):53001.
APA	赵洁.,温良剑.,王贻芳.,曹俊.,Zhao, J.,...&Cao, J.(2017).Physics potential of searching for 0 nu beta beta decays in JUNO.CHINESE PHYSICS C中国物理. C,41(5),53001.
MLA	赵洁,et al."Physics potential of searching for 0 nu beta beta decays in JUNO".CHINESE PHYSICS C中国物理. C 41.5(2017):53001.