First search for light fermionic dark matter absorption on electrons using germanium detector in CDEX-10 experiment

Physical review. D/Physical review. D. 2026 Open access

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Authors: J. X. Liu, L. T. Yang, Q. Yue, K. J. Kang, Y. J. Li, Haipeng An, C. Greeshma, J. P. Chang, Y. H. Chen, J. P. Cheng, W. H. Dai, Z. Deng
+74 more C. H. Fang, Xiaowan Geng, Haipeng Gong, Q. J. Guo, Tingting Guo, X. Y. Guo, Long Biao He, Jinjin He, J. Hu, H. X. Huang, T. C. Huang, L. W. Jiang, Shuvadeep Karmakar, Hui Li, Haiying Li, J. M. Li, Jiawen Li, M. C. Li, Q. Y. Li, R. M. J. Li, Ruomeng Li, Y. L. Li, Liang Yu, Bin Liao, F. K. Lin, S. T. Lin, S. K. Liu, Y. D. Liu, Yang Liu, Y. Y. Liu, Haitao Ma, Y. C. Mao, Q. Y. Nie, Huihui Pan, Ningchun Qi, J. Ren, Xichao Ruan, M. B. Shen, Manoj Kumar Singh, T. X. Sun, Wenliang Sun, C. J. Tang, Y. Tian, G. F. Wang, J. Z. Wang, Lai Wang, Qing Wang, Y. F. Wang, Yuhang Wang, H. T. Wong, Y. C. Wu, H. Y. Xing, Kai Xiong, Ruochen Xu, Y. Xu, Tao Xue, Y. L. Yan, Yi Nan, C. X. Yu, H. J. Yu, M. Zeng, Zhi Zeng, B. T. Zhang, F. S. Zhang, L. Zhang, P. Zhang, Z. H. Zhang, Z. Y. Zhang, J. Z. Zhao, K. K. Zhao, M. G. Zhao, J. F. Zhou, Z. Y. Zhou, J. J. Zhu
DOI: 10.1103/hq9t-z4xf
Cited by: 0
References: 67

Abstract

We present the first results of the search for sub-MeV fermionic dark matter absorbed by electron targets of germanium using the 205.4 kg · day data collected by the CDEX-10 experiment, with the analysis threshold of 160 eVee. No significant dark matter (DM) signals over the background are observed. Results are presented as limits on the cross section of DM–electron interaction. We present new constraints of cross section in the DM range of 0.1 – 10 keV / c 2 for vector and axial-vector interaction. The upper limit on the cross section is set to be 6.8 × 10 − 46 cm 2 for vector interaction, and 2.3 × 10 − 46 cm 2 for axial-vector interaction at DM mass of 5 keV / c 2 .

Fields of Study & Subjects

Dark Matter and Cosmic Phenomena Atomic and Subatomic Physics Research Scientific Research and Discoveries

Publication details

Journal / source
Physical review. D/Physical review. D.
Publisher
American Physical Society (APS)
Volume
113
Issue
3
Publication date
21 January 2026
Language
EN