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

J. X. Liu; L. T. Yang; Q. Yue; K. J. Kang; Y. J. Li; H. P. An; Greeshma C.; J. P. Chang; Y. H. Chen; J. P. Cheng; W. H. Dai; Z. Deng; C. H. Fang; X. P. Geng; H. Gong; Q. J. Guo; T. Guo; X. Y. Guo; L. He; J. R. He; J. W. Hu; H. X. Huang; T. C. Huang; L. Jiang; S. Karmakar; H. B. Li; H. Y. Li; J. M. Li; J. Li; M. C. Li; Q. Y. Li; R. M. J. Li; X. Q. Li; Y. L. Li; Y. F. Liang; B. Liao; F. K. Lin; S. T. Lin; S. K. Liu; Y. D. Liu; Y. Liu; Y. Y. Liu; H. Ma; Y. C. Mao; Q. Y. Nie; H. Pan; N. C. Qi; J. Ren; X. C. Ruan; M. B. Shen

doi:10.1103/hq9t-z4xf

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

High Energy Physics - Experiment 2026-02-18 v2 High Energy Physics - Phenomenology Instrumentation and Detectors

Authors: J. X. Liu , L. T. Yang , Q. Yue , K. J. Kang , Y. J. Li , H. P. An , Greeshma C. , J. P. Chang , Y. H. Chen , J. P. Cheng , W. H. Dai , Z. Deng , C. H. Fang , X. P. Geng , H. Gong , Q. J. Guo , T. Guo , X. Y. Guo , L. He , J. R. He , J. W. Hu , H. X. Huang , T. C. Huang , L. Jiang , S. Karmakar , H. B. Li , H. Y. Li , J. M. Li , J. Li , M. C. Li , Q. Y. Li , R. M. J. Li , X. Q. Li , Y. L. Li , Y. F. Liang , B. Liao , F. K. Lin , S. T. Lin , S. K. Liu , Y. D. Liu , Y. Liu , Y. Y. Liu , H. Ma , Y. C. Mao , Q. Y. Nie , H. Pan , N. C. Qi , J. Ren , X. C. Ruan , M. B. Shen , M. K. Singh , T. X. Sun , W. L. Sun , C. J. Tang , Y. Tian , G. F. Wang , J. Z. Wang , L. Wang , Q. Wang , Y. F. Wang , Y. X. Wang , H. T. Wong , Y. C. Wu , H. Y. Xing , K. Z. Xiong , R. Xu , Y. Xu , T. Xue , Y. L. Yan , N. Yi , C. X. Yu , H. J. Yu , M. Zeng , Z. 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

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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 $\cdot$ 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 $\rm 6.8\times10^{-46}~cm^2$ for vector interaction, and $\rm 2.3\times10^{-46}~cm^2$ for axial-vector interaction at DM mass of 5 keV/ $c^2$ .

Keywords

dark matter detection precision measurements in physics

Cite

@article{arxiv.2404.09793,
  title  = {First search for light fermionic dark matter absorption on electrons using germanium detector in CDEX-10 experiment},
  author = {J. X. Liu and L. T. Yang and Q. Yue and K. J. Kang and Y. J. Li and H. P. An and Greeshma C. and J. P. Chang and Y. H. Chen and J. P. Cheng and W. H. Dai and Z. Deng and C. H. Fang and X. P. Geng and H. Gong and Q. J. Guo and T. Guo and X. Y. Guo and L. He and J. R. He and J. W. Hu and H. X. Huang and T. C. Huang and L. Jiang and S. Karmakar and H. B. Li and H. Y. Li and J. M. Li and J. Li and M. C. Li and Q. Y. Li and R. M. J. Li and X. Q. Li and Y. L. Li and Y. F. Liang and B. Liao and F. K. Lin and S. T. Lin and S. K. Liu and Y. D. Liu and Y. Liu and Y. Y. Liu and H. Ma and Y. C. Mao and Q. Y. Nie and H. Pan and N. C. Qi and J. Ren and X. C. Ruan and M. B. Shen and M. K. Singh and T. X. Sun and W. L. Sun and C. J. Tang and Y. Tian and G. F. Wang and J. Z. Wang and L. Wang and Q. Wang and Y. F. Wang and Y. X. Wang and H. T. Wong and Y. C. Wu and H. Y. Xing and K. Z. Xiong and R. Xu and Y. Xu and T. Xue and Y. L. Yan and N. Yi and C. X. Yu and H. J. Yu and M. Zeng and Z. Zeng and B. T. Zhang and F. S. Zhang and L. Zhang and P. Zhang and Z. H. Zhang and Z. Y. Zhang and J. Z. Zhao and K. K. Zhao and M. G. Zhao and J. F. Zhou and Z. Y. Zhou and J. J. Zhu},
  journal= {arXiv preprint arXiv:2404.09793},
  year   = {2026}
}

Comments

6 pages, 4 figures. Version updated to match PRD version

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

Abstract

Keywords

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