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

作　　者：Zhou Huang Guofang Shen Qiuhong Wang Abdusalam Abdukerim Zihao Bo Wei Chen Xun Chen Yunhua Chen Chen Cheng Yunshan Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu Lisheng Geng Karl Giboni Linhui Gu Xuyuan Guo Chencheng Han Ke Han Changda He Jinrong He Di Huang Yanlin Huang Ruquan Hou Xiangdong Ji Yonglin Ju Chenxiang Li Mingchuan Li Shu Li Shuaijie Li Qing Lin Jianglai Liu Xiaoying Lu Lingyin Luo Wenbo Ma Yugang Ma Yajun Mao Yue Meng Xuyang Ning Ningchun Qi Zhicheng Qian Xiangxiang Ren Nasir Shaheed Changsong Shang Lin Si Wenliang Sun Andi Tan Yi Tao Anqing Wang Meng Wang Shaobo Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Weihao Wu Jingkai Xia Mengjiao Xiao Xiang Xiao Pengwei Xie Binbin Yan Xiyu Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Dan Zhang Minzhen Zhang Peng Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou Yong Zhou 黄周;申国防;王秋红;阿布都沙拉木·阿布都克力木;薄子豪;陈葳;谌勋;陈云华;程晨;成云珊;崔祥仪;樊英杰;方德清;符长波;付孟婷;耿立升;Karl Giboni;顾琳慧;郭绪元;韩晨成;韩柯;何昶达;何金荣;黄迪;黄彦霖;侯汝全;季向东;巨永林;李晨翔;李名川;李舒;李帅杰;林箐;刘江来;芦晓盈;罗棱尹;马文博;马余刚;冒亚军;孟月;宁旭阳;祁宁春;钱志成;任祥祥;Nasir Shaheed;商长松;司琳;孙文良;谈安迪;陶奕;王安庆;王萌;王少博;王思广;王为;王秀丽;王舟;武蒙蒙;邬维浩;夏经铠;肖梦姣;肖翔;谢鹏伟;燕斌斌;颜玺雨;杨继军;杨勇;喻纯旭;袁鞠敏;袁影;张丹;张敏祯;张鹏;张涛;赵力;郑其斌;周济芳;周宁;周小朋;周永(School of Physics and Astronomy,Shanghai Jiao Tong University,Key Laboratory for Particle Astrophysics and Cosmology(MoE),Shanghai Key Laboratory for Particle Physics and Cosmology,Shanghai 200240,China;School of Physics,Beihang University,Beijing 102206,China;Key Laboratory of Nuclear Physics and Ion-beam Application(MOE),Institute of Modern Physics,Fudan University,Shanghai 200433,China;Shanghai Jiao Tong University Sichuan Research Institute,Chengdu 610213,China;Yalong River Hydropower Development Company,Ltd.,288 Shuanglin Road,Chengdu 610051,China;School of Physics,Sun Yat-Sen University,Guangzhou 510275,China;Research Center for Particle Science and Technology,Institute of Frontier and Interdisciplinary Scienc,Shandong University,Qingdao 266237,China;Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education,Shandong University,Qingdao 266237,China;Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai,200240,China;School of Physics,Nankai University,Tianjin 300071,China;School of Physics,Peking University,Beijing 100871,China;Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing,102206,China;School of Physics and Microelectronics,Zhengzhou University,Zhengzhou,Henan 450001,China;Schoo

机构地区：[1]School of Physics and Astronomy,Shanghai Jiao Tong University,Key Laboratory for Particle Astrophysics and Cosmology(MoE),Shanghai Key Laboratory for Particle Physics and Cosmology,Shanghai 200240,China [2]School of Physics,Beihang University,Beijing 102206,China [3]Key Laboratory of Nuclear Physics and Ion-beam Application(MOE),Institute of Modern Physics,Fudan University,Shanghai 200433,China [4]Shanghai Jiao Tong University Sichuan Research Institute,Chengdu 610213,China [5]Yalong River Hydropower Development Company,Ltd.,288 Shuanglin Road,Chengdu 610051,China [6]School of Physics,Sun Yat-Sen University,Guangzhou 510275,China [7]Research Center for Particle Science and Technology,Institute of Frontier and Interdisciplinary Scienc,Shandong University,Qingdao 266237,China [8]Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education,Shandong University,Qingdao 266237,China [9]Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai,200240,China [10]School of Physics,Nankai University,Tianjin 300071,China [11]School of Physics,Peking University,Beijing 100871,China [12]Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing,102206,China [13]School of Physics and Microelectronics,Zhengzhou University,Zhengzhou,Henan 450001,China [14]School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China [15]Department of Physics,University of Maryland,College Park,Maryland 20742,USA [16]School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [17]State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China [18]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [19]SJTU Paris Elite Institute of Technology,Shanghai Jiao Tong University,Shanghai,200240,China

出　　处：《Chinese Physics C》2022年第11期262-274,共13页中国物理C（英文版）

基　　金：Supported in part by grants from National Science Foundation of China(12090061,12005131,11905128,11925502);the Ministry of Science and Technology of China(2016YFA0400301);the Office of Science and Technology,Shanghai Municipal Government(18JC1410200)。

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.

关 键 词：dark matter neutron background multiple scattering high energy gamma 

分 类 号：O571.5[理学—粒子物理与原子核物理]