Position reconstruction and surface background model for the PandaX-4T detector Article Swipe

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Zhicheng Qian , Linhui Gu , Cheng Chen , Zihao Bo , Wei Chen , Xun Chen , Yunhua Chen , Zhaokan Cheng , Xiangyi Cui , Yingjie Fan , Deqing Fang , Zhixing Gao , Li‐Sheng Geng , Karl Giboni , Xunan Guo , Xuyuan Guo , Zichao Guo , Chencheng Han , Han Ke , Changda He , Jinrong He , Di Huang , Houqi Huang , J. Huang , Ruquan Hou , Yu Hou , Xiangdong Ji , Xiangpan Ji , Yonglin Ju , Chenxiang Li , Jiafu Li , Mingchuan Li , Shuaijie Li , Tao Li , Zhiyuan Li , Qing Lin , Jianglai Liu , Congcong Lu , Xiaoying Lu , Lingyin Luo , Yunyang Luo , Wenbo Ma , Yugang Ma , Yajun Mao , Meng Yue , Xuyang Ning , Binyu Pang , Ningchun Qi , Xiangxiang Ren , Dong Shan , Xiaofeng Shang , Xiyuan Shao , Guofang Shen , Manbin Shen , Wenliang Sun , Tao Yi , Anqing Wang , Guanbo Wang , Hao Wang , Jiamin Wang , Yaohui Wang , Meng Wang , Qiu-Hong Wang , Shaobo Wang , Siguang Wang , Wei Wang , Xiuli Wang , Xu Wang , Weijia Zhou , Yuehuan Wei , Weihao Wu , Yuan Wu , Mengjiao Xiao , Xiang Xiao , Kaizhi Xiong , Yifan Xu , Shunyu Yao , Binbin Yan , Xiyu Yan , Yong Yang , Peihua Ye , Chunxu Yu , Ying Yuan , Zhe Yuan , Youhui Yun , Xinning Zeng , Minzhen Zhang , Peng Zhang , Shibo Zhang , Shu Zhang , Tao Zhang , Wei Zhang , Yang Zhang , Yingxin Zhang , Yuanyuan Zhang , Zhao Li , Jifang Zhou , Jiaxu Zhou , Jiayi Zhou , N. Zhou ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2502.07317

We report the position reconstruction methods and surface background model for the PandaX-4T dark matter direct search experiment. This work develops two position reconstruction algorithms: template matching (TM) method and photon acceptance function (PAF) method. Both methods determine the horizontal position of events based on the light pattern of secondary scintillation collected by the light sensors. After a comprehensive evaluation of resolution, uniformity, and robustness, the PAF method was selected for position reconstruction, while the TM method was employed for verification. The PAF method achieves a bulk event resolution of 1.0 mm and a surface event resolution of 4.4 mm for a typical $S2$ signal with a bottom charge of 1500 PE (about 14 keV). The uniformity is around 20\%. Robustness studies reveal average deviations of 5.1 mm and 8.8 mm for the commissioning run (Run0) and the first science run (Run1), respectively, due to the deactivation of certain PMTs. A data-driven surface background model is developed based on the PAF method. The surface background is estimated to be $0.09 \pm 0.06$ events for Run0 (0.54 tonne$\cdot$year) and $0.17 \pm 0.11$ events for Run1 (1.00 tonne$\cdot$year).

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Position (finance) Detector Physics Computer science Telecommunications Business Finance

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2502.07317
PDF: https://arxiv.org/pdf/2502.07317
OA Status: green
Related Works: 10
OpenAlex ID: https://openalex.org/W4407424337

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DOI: https://doi.org/10.48550/arxiv.2502.07317

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Title: Position reconstruction and surface background model for the PandaX-4T detector

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Type: preprint

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Language: en

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Publication year: 2025

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Publication date: 2025-02-11

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Authors: Zhicheng Qian, Linhui Gu, Cheng Chen, Zihao Bo, Wei Chen, Xun Chen, Yunhua Chen, Zhaokan Cheng, Xiangyi Cui, Yingjie Fan, Deqing Fang, Zhixing Gao, Li‐Sheng Geng, Karl Giboni, Xunan Guo, Xuyuan Guo, Zichao Guo, Chencheng Han, Han Ke, Changda He, Jinrong He, Di Huang, Houqi Huang, J. Huang, Ruquan Hou, Yu Hou, Xiangdong Ji, Xiangpan Ji, Yonglin Ju, Chenxiang Li, Jiafu Li, Mingchuan Li, Shuaijie Li, Tao Li, Zhiyuan Li, Qing Lin, Jianglai Liu, Congcong Lu, Xiaoying Lu, Lingyin Luo, Yunyang Luo, Wenbo Ma, Yugang Ma, Yajun Mao, Meng Yue, Xuyang Ning, Binyu Pang, Ningchun Qi, Xiangxiang Ren, Dong Shan, Xiaofeng Shang, Xiyuan Shao, Guofang Shen, Manbin Shen, Wenliang Sun, Tao Yi, Anqing Wang, Guanbo Wang, Hao Wang, Jiamin Wang, Yaohui Wang, Meng Wang, Qiu-Hong Wang, Shaobo Wang, Siguang Wang, Wei Wang, Xiuli Wang, Xu Wang, Weijia Zhou, Yuehuan Wei, Weihao Wu, Yuan Wu, Mengjiao Xiao, Xiang Xiao, Kaizhi Xiong, Yifan Xu, Shunyu Yao, Binbin Yan, Xiyu Yan, Yong Yang, Peihua Ye, Chunxu Yu, Ying Yuan, Zhe Yuan, Youhui Yun, Xinning Zeng, Minzhen Zhang, Peng Zhang, Shibo Zhang, Shu Zhang, Tao Zhang, Wei Zhang, Yang Zhang, Yingxin Zhang, Yuanyuan Zhang, Zhao Li, Jifang Zhou, Jiaxu Zhou, Jiayi Zhou, N. Zhou

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Landing page: https://arxiv.org/abs/2502.07317

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Concepts: Position (finance), Detector, Physics, Computer science, Telecommunications, Business, Finance

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