Probing dark matter particles from evaporating primordial black holes via electron scattering in the CDEX-10 experiment

• Published in: Science China. Physics, mechanics & astronomy Vol. 67; no. 10; p. 101011
• Main Authors: Zhang, Zhenhua, Yang, Litao, Yue, Qian, Kang, Kejun, Li, Yuanjing, An, Haipeng, Greeshma, C., Chang, Jianping, Chen, Yunhua, Cheng, Jianping, Dai, Wenhan, Deng, Zhi, Fang, Changhao, Geng, Xinping, Gong, Hui, Guo, Qiuju, Guo, Tao, Guo, Xuyuan, He, Li, He, Shengming, Hu, Jinwei, Huang, Hanxiong, Huang, Tuchen, Jiang, Lin, Karmakar, S., Li, Haubin, Li, Hanyu, Li, Jianmin, Li, Jin, Li, Qianyun, Li, Renmingjie, Li, Xueqian, Li, Yulan, Liang, Yifan, Liao, Bin, Lin, FongKay, Lin, ShinTed, Liu, Jiaxuan, Liu, Shukui, Liu, Yandong, Liu, Yu, Liu, Yuanyuan, Ma, Hao, Mao, Yucai, Nie, Qiyuan, Ning, Jinhua, Pan, Hui, Qi, Ningchun, Ren, Jie, Ruan, Xichao, Singh, Monoj Kumar, Sun, Tianxi, Tang, Changjian, Tian, Yang, Wang, Guangfu, Wang, Junzheng, Wang, Li, Wang, Qing, Wang, Yufeng, Wang, Yunxiang, Wong, Henry Tsz-King, Wu, Shiyong, Wu, Yucheng, Xing, Haoyang, Xu, Rui, Xu, Yin, Xue, Tao, Yan, Yulu, Yi, Nan, Yu, Chunxu, Yu, Haijun, Yue, Jianfeng, Zeng, Ming, Zeng, Zhi, Zhang, Bingtao, Zhang, Fengshou, Zhang, Lei, Zhang, Zhenyu, Zhao, Jizhong, Zhao, Kangkang, Zhao, Minggang, Zhou, Jifang, Zhou, Zuying, Zhu, Jingjun
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.10.2024; Springer Nature B.V
• Subjects: Astronomy; Black holes; Classical and Continuum Physics; Collaboration; Cosmic rays; Dark matter; Elastic limit; Elastic scattering; Electrons; Experiments; Neutrinos; Observations and Techniques; Particle physics; Physics; Physics and Astronomy; Radiation; Scattering cross sections; Target detection; Universe; high purity germanium detector; dark matter-electron scattering; CDEX; primordial black hole; light dark matter particle
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-024-2446-2

Dark matter (DM) is a major constituent of the Universe. However, no definite evidence of DM particles (denoted as “ χ ”) has been found in DM direct detection (DD) experiments to date. There is a novel concept of detecting χ from evaporating primordial black holes (PBHs). We search for χ emitted from PBHs by investigating their interaction with target electrons. The examined PBH masses range from 1 × 10 15 to 7 × 10 16 g under the current limits of PBH abundance f PBH . Using 205.4 kg·day data obtained from the CDEX-10 experiment conducted in the China Jinping Underground Laboratory, we exclude the χ -electron ( χ - e ) elastic-scattering cross section σ χ e ∼ 5 × 10 −29 cm 2 for χ with a mass m χ ≲ 0.1 keV from our results. With the higher radiation background but lower energy threshold (160 eV), CDEX-10 fills a part of the gap in the previous work. If ( m χ , σ χ e ) can be determined in the future, DD experiments are expected to impose strong constraints on f PBH for large M PBH s.