Author:
Huang Zhou,Shen Guofang,Wang Qiuhong,Abdukerim Abdusalam,Bo Zihao,Chen Wei,Chen Xun,Chen Yunhua,Cheng Chen,Cheng Yunshan,Cui Xiangyi,Fan Yingjie,Fang Deqing,Fu Changbo,Fu Mengting,Geng Lisheng,Giboni Karl,Gu Linhui,Guo Xuyuan,Han Chencheng,Han Ke,He Changda,He Jinrong,Huang Di,Huang Yanlin,Hou Ruquan,Ji Xiangdong,Ju Yonglin,Li Chenxiang,Li Mingchuan,Li Shu,Li Shuaijie,Lin Qing,Liu Jianglai,Lu Xiaoying,Luo Lingyin,Ma Wenbo,Ma Yugang,Mao Yajun,Meng Yue,Ning Xuyang,Qi Ningchun,Qian Zhicheng,Ren Xiangxiang,Shaheed Nasir,Shang Changsong,Si Lin,Sun Wenliang,Tan Andi,Tao Yi,Wang Anqing,Wang Meng,Wang Shaobo,Wang Siguang,Wang Wei,Wang Xiuli,Wang Zhou,Wu Mengmeng,Wu Weihao,Xia Jingkai,Xiao Mengjiao,Xiao Xiang,Xie Pengwei,Yan Binbin,Yan Xiyu,Yang Jijun,Yang Yong,Yu Chunxu,Yuan Jumin,Yuan Ying,Zhang Dan,Zhang Minzhen,Zhang Peng,Zhang Tao,Zhao Li,Zheng Qibin,Zhou Jifang,Zhou Ning,Zhou Xiaopeng,Zhou Yong
Abstract
Abstract
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
neutron-induced backgrounds in the dark matter signal region within an approximated nuclear recoil energy window between 5 and 100 keV.
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics