Muon flux measurement at China Jinping Underground Laboratory

被引：26

作者：

Guo, Zi-yi ^{[1
,2
]}

Bathe-Peters, Lars ^{[1
,4
]}

Chen, Shao-min ^{[1
,2
,3
]}

Chouaki, Mourad ^{[1
,5
]}

Dou, Wei ^{[1
,2
]}

Guo, Lei ^{[1
,2
]}

Hussain, Ghulam ^{[1
,2
]}

Li, Jin-jing ^{[1
,2
]}

Liu, Qian ^{[6
]}

Luo, Guang ^{[7
]}

Luo, Wen-tai ^{[6
]}

Qi, Ming ^{[8
]}

Shao, Wen-hui ^{[1
,2
]}

Tang, Jian ^{[7
]}

Wan, Lin-yan ^{[1
,2
]}

Wang, Zhe ^{[1
,2
,3
]}

Xu, Ben-da ^{[1
,2
,3
]}

Xu, Tong ^{[1
,2
]}

Xu, Wei-ran ^{[1
,2
]}

Yang, Yu-zi ^{[1
,2
]}

Yeh, Minfang ^{[9
]}

Zhao, Lin ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China

[3] Tsinghua Univ, Minist Educ, Key Lab Particle & Radiat Imaging, Beijing, Peoples R China

[4] Tech Univ Berlin, Inst Phys, D-10623 Berlin, Germany

[5] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[6] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

[7] Sun Yat Sen Univ, Sch Phys, Guangzhou 510275, Peoples R China

[8] Nanjing Univ, Sch Phys, Nanjing 210093, Peoples R China

[9] Brookhaven Natl Lab, Upton, NY 11973 USA

来源：

CHINESE PHYSICS C | 2021年 / 45卷 / 02期

基金：

美国能源部; 中国国家自然科学基金;

关键词：

CJPL; cosmic-ray muon flux; angular distribution; neutrino detector; liquid scintillator;

D O I：

10.1088/1674-1137/abccae

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

China Jinping Underground Laboratory (CJPL) is ideal for studying solar, geo-, and supernova neutrinos. A precise measurement of the cosmic-ray background is essential in proceeding with R&D research for these MeV-scale neutrino experiments. Using a 1-ton prototype detector for the Jinping Neutrino Experiment (JNE), we detected 264 high-energy muon events from a 645.2-day dataset from the first phase of CJPL (CJPL-I), reconstructed their directions, and measured the cosmic-ray muon flux to be (3.53 +/- 0.22(stat.) +/- 0.07(sys.)) x 10(-10) cm(-2)s(-1). The observed angular distributions indicate the leakage of cosmic-ray muon background and agree with simulation data accounting for Jinping mountain's terrain. A survey of muon fluxes at different laboratory locations, considering both those situated under mountains and those down mine shafts, indicates that the flux at the former is generally a factor of (4 +/- 2) larger than at the latter, with the same vertical overburden. This study provides a convenient back-of-the-envelope estimation for the muon flux of an underground experiment.

引用

页数：9

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