arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2408.00664hep-ex
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PandaX-4T 1.54吨·年曝光量的暗物质搜寻结果

Dark Matter Search Results from 1.54 Tonne$\cdot$Year Exposure of PandaX-4T

PandaX Collaboration, Zihao Bo, Wei Chen, Xun Chen, Yunhua Chen, Zhaokan Cheng, Xiangyi Cui, Yingjie Fan, Deqing Fang, Zhixing Gao, Lisheng Geng, Karl Giboni, X… 展开作者

PandaX Collaboration, Zihao Bo, Wei Chen, Xun Chen, Yunhua Chen, Zhaokan Cheng, Xiangyi Cui, Yingjie Fan, Deqing Fang, Zhixing Gao, Lisheng Geng, Karl Giboni, Xunan Guo, Xuyuan Guo, Zichao Guo, Chencheng Han, Ke Han, Changda He, Jinrong He, Di Huang, Houqi Huang, Junting 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, Yue Meng, Xuyang Ning, Binyu Pang, Ningchun Qi, Zhicheng Qian, Xiangxiang Ren, Dong Shan, Xiaofeng Shang, Xiyuan Shao, Guofang Shen, Manbin Shen, Wenliang Sun, Yi Tao, Anqing Wang, Guanbo Wang, Hao Wang, Jiamin Wang, Lei Wang, Meng Wang, Qiuhong Wang, Shaobo Wang, Siguang Wang, Wei Wang, Xiuli Wang, Xu Wang, Zhou Wang, 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, Li Zhao, Jifang Zhou, Jiaxu Zhou, Jiayi Zhou, Ning Zhou, Xiaopeng Zhou, Yubo Zhou, Zhizhen Zhou

AI总结:

PandaX-4T 基于 1.54 吨·年曝光数据开展盲分析,未发现显著核反冲超出,并在 40 GeV/c² 处给出 1.6×10⁻⁴⁷ cm² 的自旋无关截面排除限,为 100 GeV/c² 以上暗物质提供最严格约束。

摘要:

在本通讯中,我们报告了 PandaX-4T 实验调试运行和首次科学运行的暗物质搜寻结果。对整个数据集进行了盲分析。与先前工作相比,数据处理得到改进,在高达 120 keV 的宽能量范围内统一了低电平信号重建。在总曝光量为 1.54 吨·年的条件下,未发现显著的核反冲事件超出。在暗物质质量为 40 GeV/c² 时,自旋无关截面的最低 90% 置信水平排除限为 1.6×10⁻⁴⁷ cm²。对于质量超过 100 GeV/c² 的暗物质,我们的结果代表了最严格的约束。

英文摘要:

In this letter, we report the dark matter search results from the commissioning run and the first science run of the PandaX-4T experiment. A blind analysis is carried out on the entire data set. The data processing is improved compared to previous work, unifying the low-level signal reconstruction in a wide energy range up to 120 keV. With a total exposure of 1.54 tonne$\cdot$year, no significant excess of nuclear recoil events is found. The lowest 90% confidence level exclusion on the spin-independent cross section is $1.6 \times 10^{-47}\,\mathrm{cm}^2$ at a dark matter mass of 40 GeV$/c^2$. Our results represent the most stringent constraint for a dark matter mass above 100 GeV$/c^2$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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