在PandaX-4T中搜索大气中的轻暗物质
摘要：在这篇论文中，我们报告了通过级联衰变产生的轻暗物质的搜索，这些暗物质是由宇宙射线和地球大气层之间的非弹性碰撞产生的$eta$介子所创建的。我们引入了一个新的通用框架，可以公开访问，专门用于研究提升的暗物质，并进行了全面和专门的模拟，包括地球衰减对达到探测器的暗物质粒子的弹性和准弹性过程。在PandaX-4T的0.63吨·年曝光的试运行数据中，没有观察到超过背景的显著过剩信号。我们获得了大气中产生的轻暗物质与核之间通过轻标量传播子的相互作用的第一个限制。排除交叉截面的最低值为$5.9\times 10^{-37} cm^2$，对应暗物质质量为$0.1$ MeV$/c^2$和传播子质量为300 MeV$/c^2$。$eta$到暗物质衰变分支比的最低上限为$1.6\times 10^{-7}$。
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, and Yubo Zhou (for the PandaX Collaboration) Liangliang Su and Lei Wu
论文ID：2301.03010
分类：High Energy Physics - Experiment
分类简称：hep-ex
提交时间：2023-08-16