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

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发表日期：

2024年8月26日

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Zhenhua Zhang,
Litao Yang,
Qian Yue,
Kejun Kang,
Yuanjing Li,
Haipeng An,
C. Greeshma,
Jianping Chang,
Yunhua Chen,
Jianping Cheng,
Wenhan Dai,
Zhi Deng,
Changhao Fang,
Xinping Geng,
Hui Gong,
Qiuju Guo,
Tao Guo,
Xuyuan Guo,
Li He,
Shengming He,
Jinwei Hu,
Hanxiong Huang,
Tuchen Huang,
Lin Jiang,
S. Karmakar,
Haubin Li,
Hanyu Li,
Jianmin Li,
Jin Li,
Qianyun Li,
Renmingjie Li,
Xueqian Li,
Yulan Li,
Yifan Liang,
Bin Liao,
FongKay Lin,
ShinTed Lin,
Jiaxuan Liu,
Shukui Liu,
Yandong Liu,
Yu Liu,
Yuanyuan Liu,
Hao Ma,
Yucai Mao,
Qiyuan Nie,
Jinhua Ning,
Hui Pan,
Ningchun Qi,
Jie Ren,
Xichao Ruan,
Monoj Kumar Singh,
Tianxi Sun,
Changjian Tang,
Yang Tian,
Guangfu Wang,
Junzheng Wang,
Li Wang,
Qing Wang,
Yufeng Wang,
Yunxiang Wang,
Henry Tsz-King Wong,
Shiyong Wu,
Yucheng Wu,
Haoyang Xing,
Rui Xu,
Yin Xu,
Tao Xue,
Yulu Yan,
Nan Yi,
Chunxu Yu,
Haijun Yu,
Jianfeng Yue,
Ming Zeng,
Zhi Zeng,
Bingtao Zhang,
Fengshou Zhang,
Lei Zhang,
Zhenyu Zhang,
Jizhong Zhao,
Kangkang Zhao,
Minggang Zhao,
Jifang Zhou,
Zuying Zhou,
Jingjun Zhu

摘要

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 × 10¹⁵ to 7 × 10¹⁶ 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 $\sigma_{{\chi}^{e}}$ $σ_{χ^{e}}$ ∼ 5 × 10⁻²⁹ cm² 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 ( $m_{\chi}, \ \sigma_{{\chi}^{e}}$ $m_{χ}, σ_{χ^{e}}$ ) can be determined in the future, DD experiments are expected to impose strong constraints on f_PBH for large M_PBHs.