Constraints on Sub-GeV Dark Matter--Electron Scattering from the CDEX-10 Experiment

Z. Y. Zhang; L. T. Yang; Q. Yue; K. J. Kang; Y. J. Li; M. Agartioglu; H. P. An; 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; X. Y. Guo; L. He; S. M. He; J. W. Hu; H. X. Huang; T. C. Huang; H. T. Jia; X. Jiang; H. B. Li; J. M. Li; J. 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; Z. Z. Liu; H. Ma; Y. C. Mao; Q. Y. Nie; J. H. Ning; H. Pan; N. C. Qi; J. Ren; X. C. Ruan; K. Saraswat; V. Sharma

doi:10.1103/PhysRevLett.129.221301

Constraints on Sub-GeV Dark Matter--Electron Scattering from the CDEX-10 Experiment

High Energy Physics - Experiment 2022-11-22 v2 High Energy Physics - Phenomenology Instrumentation and Detectors

Authors: Z. Y. Zhang , L. T. Yang , Q. Yue , K. J. Kang , Y. J. Li , M. Agartioglu , H. P. An , 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 , X. Y. Guo , L. He , S. M. He , J. W. Hu , H. X. Huang , T. C. Huang , H. T. Jia , X. Jiang , H. B. Li , J. M. Li , J. 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 , Z. Z. Liu , H. Ma , Y. C. Mao , Q. Y. Nie , J. H. Ning , H. Pan , N. C. Qi , J. Ren , X. C. Ruan , K. Saraswat , V. Sharma , Z. She , M. K. Singh , T. X. Sun , C. J. Tang , W. Y. Tang , Y. Tian , G. F. Wang , L. Wang , Q. Wang , Y. Wang , Y. X. Wang , H. T. Wong , S. Y. Wu , Y. C. Wu , H. Y. Xing , R. Xu , Y. Xu , T. Xue , Y. L. Yan , C. H. Yeh , N. Yi , C. X. Yu , H. J. Yu , J. F. Yue , M. Zeng , Z. Zeng , B. T. Zhang , F. S. Zhang , L. Zhang , Z. H. Zhang , K. K. Zhao , M. G. Zhao , J. F. Zhou , Z. Y. Zhou , J. J. Zhu

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Abstract

We present improved germanium-based constraints on sub-GeV dark matter via dark matter--electron ( $\chi$ - $e$ ) scattering using the 205.4 kg $\cdot$ day dataset from the CDEX-10 experiment. Using a novel calculation technique, we attain predicted $\chi$ - $e$ scattering spectra observable in high-purity germanium detectors. In the heavy mediator scenario, our results achieve 3 orders of magnitude of improvement for $m_{\chi}$ larger than 80 MeV/c $^2$ compared to previous germanium-based $\chi$ - $e$ results. We also present the most stringent $\chi$ - $e$ cross-section limit to date among experiments using solid-state detectors for $m_{\chi}$ larger than 90 MeV/c $^2$ with heavy mediators and $m_{\chi}$ larger than 100 MeV/c $^2$ with electric dipole coupling. The result proves the feasibility and demonstrates the vast potential of a new $\chi$ - $e$ detection method with high-purity germanium detectors in ultralow radioactive background.

Keywords

sub-gev dark matter dark matter-electron scattering cdex-10 high-purity germanium detector heavy mediator electric dipole coupling

Cite

@article{arxiv.2206.04128,
  title  = {Constraints on Sub-GeV Dark Matter--Electron Scattering from the CDEX-10 Experiment},
  author = {Z. Y. Zhang and L. T. Yang and Q. Yue and K. J. Kang and Y. J. Li and M. Agartioglu and H. P. An 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 X. Y. Guo and L. He and S. M. He and J. W. Hu and H. X. Huang and T. C. Huang and H. T. Jia and X. Jiang and H. B. Li and J. M. Li and J. 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 Z. Z. Liu and H. Ma and Y. C. Mao and Q. Y. Nie and J. H. Ning and H. Pan and N. C. Qi and J. Ren and X. C. Ruan and K. Saraswat and V. Sharma and Z. She and M. K. Singh and T. X. Sun and C. J. Tang and W. Y. Tang and Y. Tian and G. F. Wang and L. Wang and Q. Wang and Y. Wang and Y. X. Wang and H. T. Wong and S. Y. Wu and Y. C. Wu and H. Y. Xing and R. Xu and Y. Xu and T. Xue and Y. L. Yan and C. H. Yeh and N. Yi and C. X. Yu and H. J. Yu and J. F. Yue and M. Zeng and Z. Zeng and B. T. Zhang and F. S. Zhang and L. Zhang and Z. H. Zhang and K. K. Zhao and M. G. Zhao and J. F. Zhou and Z. Y. Zhou and J. J. Zhu},
  journal= {arXiv preprint arXiv:2206.04128},
  year   = {2022}
}

Comments

6 pages, 3 figures. Version updated to match PRL version

Constraints on Sub-GeV Dark Matter--Electron Scattering from the CDEX-10 Experiment

Abstract

Keywords

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