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arXiv 2301.03010hep-ex
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在 PandaX-4T 中寻找来自大气的轻暗物质

Search for light dark matter from atmosphere in PandaX-4T

Xuyang Ning, Abdusalam Abdukerim, Zihao Bo, Wei Chen, Xun Chen, Yunhua Chen, Chen Cheng, Zhaokan Cheng, Xiangyi Cui, Yingjie Fan, Deqing Fang, Changbo Fu, Mengt… 展开作者

Xuyang Ning, Abdusalam Abdukerim, Zihao Bo, Wei Chen, Xun Chen, Yunhua Chen, Chen Cheng, Zhaokan 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, Zhou Huang, Ruquan Hou, Xiangdong Ji, Yonglin Ju, Chenxiang Li, Jiafu Li, Mingchuan Li, Shu Li, Shuaijie Li, Qing Lin, Jianglai Liu, Xiaoying Lu, Lingyin Luo, Yunyang Luo, Wenbo Ma, Yugang Ma, Yajun Mao, Yue Meng, Ningchun Qi, Zhicheng Qian, Xiangxiang Ren, Nasir Shaheed, Changsong Shang, Xiaofeng Shang, Guofang Shen, Lin Si, Wenliang Sun, Andi Tan, Yi Tao, Anqing Wang, Meng Wang, Qiuhong Wang, Shaobo Wang, Siguang Wang, Wei Wang, Xiuli Wang, Zhou Wang, Yuehuan Wei, Mengmeng Wu, Weihao Wu, Jingkai Xia, Mengjiao Xiao, Xiang Xiao, Pengwei Xie, Binbin Yan, Xiyu Yan, Jijun Yang, Yong Yang, Yukun Yao, Chunxu Yu, Jumin Yuan, Ying Yuan, Zhe Yuan, Xinning Zeng, Dan Zhang, Minzhen Zhang, Peng Zhang, Shibo Zhang, Shu Zhang, Tao Zhang, Yang Zhang, Yingxin Zhang, Yuanyuan Zhang, Li Zhao, Qibin Zheng, Jifang Zhou, Ning Zhou, Xiaopeng Zhou, Yong Zhou, Yubo Zhou, Liangliang Su, Lei Wu

备注：
6 pages, 3 figures
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AI总结：

本研究利用 PandaX-4T 数据寻找宇宙线大气簇射产生的轻助推暗物质，通过公开模拟框架纳入地球衰减效应，给出轻标量媒介子相互作用及 η 衰变分支比的首批约束。

摘要：

我们报告了对通过 η 介子级联衰变产生的轻暗物质的寻找，这些 η 介子由宇宙线与地球大气之间的非弹性碰撞产生。我们引入了一个全新的、通用的且公开可用的框架，专门用于处理助推暗物质；利用该框架进行了完整且专门的模拟，其中包括到达探测器的暗物质粒子所经历的地球衰减效应的弹性和准弹性过程。在曝光量为 0.63 吨·年的 PandaX-4T 试运行数据中，未观测到相对于背景的显著超出。我们首次获得了对大气中产生的轻暗物质通过轻标量媒介子与原子核相互作用的约束。对于暗物质质量为 0.1 MeV/c²、媒介子质量为 300 MeV/c² 的情况，最低的被排除截面设定为 5.9×10⁻³⁷ cm²。η 到暗物质衰变分支比的最低上限为 1.6×10⁻⁷。

英文摘要：

We report a search for light dark matter produced through the cascading decay of $η$ mesons, which are created as a result of inelastic collisions between cosmic rays and Earth's atmosphere. We introduce a new and general framework, publicly accessible, designed to address boosted dark matter specifically, with which a full and dedicated simulation including both elastic and quasi-elastic processes of Earth attenuation effect on the dark matter particles arriving at the detector is performed. In the PandaX-4T commissioning data of 0.63 tonne$\cdot$year exposure, no significant excess over background is observed. The first constraints on the interaction between light dark matter generated in the atmosphere and nucleus through a light scalar mediator are obtained. The lowest excluded cross-section is set at $5.9 \times 10^{-37}{\rm cm^2}$ for dark matter mass of $0.1$ MeV$/c^2$ and mediator mass of 300 MeV$/c^2$. The lowest upper limit of $η$ to dark matter decay branching ratio is $1.6 \times 10^{-7}$.

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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