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.
作者
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
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(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;School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Department of Physics,University of Maryland,College Park,Maryland 20742,USA;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China;Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China;SJTU Paris Elite Institute of Technology,Shanghai Jiao Tong University,Shanghai,200240,China)
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)。
