Neutron-induced nuclear recoil background in the PandaX-4T experiment

被引：3

作者：

Huang, Zhou ^{[1
]}

Shen, Guofang ^{[2
]}

Wang, Qiuhong ^{[3
]}

Abdukerim, Abdusalam ^{[1
]}

Bo, Zihao ^{[1
]}

Chen, Wei ^{[1
]}

Chen, Xun ^{[1
,4
]}

Chen, Yunhua ^{[5
]}

Cheng, Chen ^{[6
]}

Cheng, Yunshan ^{[7
,8
]}

Cui, Xiangyi ^{[9
]}

Fan, Yingjie ^{[10
]}

Fang, Deqing ^{[3
]}

Fu, Changbo ^{[3
]}

Fu, Mengting ^{[11
]}

Geng, Lisheng ^{[2
,12
,13
]}

Giboni, Karl ^{[1
]}

Gu, Linhui ^{[1
]}

Guo, Xuyuan ^{[5
]}

Han, Chencheng ^{[1
]}

Han, Ke ^{[1
]}

He, Changda ^{[1
]}

He, Jinrong ^{[5
]}

Huang, Di ^{[1
]}

Huang, Yanlin ^{[14
]}

Hou, Ruquan ^{[4
]}

Ji, Xiangdong ^{[15
]}

Ju, Yonglin ^{[16
]}

Li, Chenxiang ^{[1
]}

Li, Mingchuan ^{[5
]}

Li, Shu ^{[16
]}

Li, Shuaijie ^{[9
]}

Lin, Qing ^{[17
,18
]}

Liu, Jianglai ^{[1
,4
,9
]}

Lu, Xiaoying ^{[7
,8
]}

Luo, Lingyin ^{[11
]}

Ma, Wenbo ^{[1
]}

Ma, Yugang ^{[3
]}

Mao, Yajun ^{[11
]}

Meng, Yue ^{[1
,4
]}

Ning, Xuyang ^{[1
]}

Qi, Ningchun ^{[5
]}

Qian, Zhicheng ^{[1
]}

Ren, Xiangxiang ^{[7
,8
]}

Shaheed, Nasir ^{[7
,8
]}

Shang, Changsong ^{[5
]}

Si, Lin ^{[1
]}

Sun, Wenliang ^{[5
]}

Tan, Andi ^{[15
]}

Tao, Yi ^{[1
,4
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Phys & Astron, Key Lab Particle Astrophys & Cosmol MoE, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China

[2] Beihang Univ, Sch Phys, Beijing 102206, Peoples R China

[3] Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China

[4] Shanghai Jiao Tong Univ, Sichuan Res Inst, Chengdu 610213, Peoples R China

[5] Yalong River Hydropower Dev Co Ltd, 288 Shuanglin Rd, Chengdu 610051, Peoples R China

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

[7] Shandong Univ, Res Ctr Particle Sci & Technol, Inst Frontier & Interdisciplinary Scienc, Qingdao 266237, Peoples R China

[8] Shandong Univ, Key Lab Particle Phys & Particle Irradiat, Minist Educ, Qingdao 266237, Peoples R China

[9] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China

[10] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China

[11] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[12] Beihang Univ, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 102206, Peoples R China

[13] Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Henan, Peoples R China

[14] Univ Shanghai Sci & Technol, Sch Med Instrument & Food Engn, Shanghai 200093, Peoples R China

[15] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[16] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China

[17] Univ Sci & Technol China, State Key Lab Particle Detect & Elect, Hefei 230026, Peoples R China

[18] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China

[19] Shanghai Jiao Tong Univ, SJTU Paris Elite Inst Technol, Shanghai 200240, Peoples R China

来源：

CHINESE PHYSICS C | 2022年 / 46卷 / 11期

关键词：

dark matter; neutron background; multiple scattering; high energy gamma;

D O I：

10.1088/1674-1137/ac8539

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：

Neutron-induced nuclear recoil background is critical to dark matter searches in the PandaX-4T liquid xenon experiment. In this study, we investigate the features of neutron background in liquid xenon and evaluate its contribution in single scattering nuclear recoil events using three methods. The first method is fully based on Monte Carlo simulations. The last two are data-driven methods that also use multiple scattering signals and high energy signals in the data. In the PandaX-4T commissioning data with an exposure of 0.63 tonne-year, all these methods give a consistent result, i.e., there are 1.15 +/- 0.57 neutron-induced backgrounds in the dark matter signal region within an approximated nuclear recoil energy window between 5 and 100 keV.

引用

页数：13

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