학술논문
Constraints on Sub-GeV Dark Matter--Electron Scattering from the CDEX-10 Experiment
Document Type
Working Paper
Author
Zhang, Z. Y.; Yang, L. T.; Yue, Q.; Kang, K. J.; Li, Y. J.; Agartioglu, M.; An, H. P.; Chang, J. P.; Chen, Y. H.; Cheng, J. P.; Dai, W. H.; Deng, Z.; Fang, C. H.; Geng, X. P.; Gong, H.; Guo, Q. J.; Guo, X. Y.; He, L.; He, S. M.; Hu, J. W.; Huang, H. X.; Huang, T. C.; Jia, H. T.; Jiang, X.; Li, H. B.; Li, J. M.; Li, J.; Li, Q. Y.; Li, R. M. J.; Li, X. Q.; Li, Y. L.; Liang, Y. F.; Liao, B.; Lin, F. K.; Lin, S. T.; Liu, S. K.; Liu, Y. D.; Liu, Y.; Liu, Y. Y.; Liu, Z. Z.; Ma, H.; Mao, Y. C.; Nie, Q. Y.; Ning, J. H.; Pan, H.; Qi, N. C.; Ren, J.; Ruan, X. C.; Saraswat, K.; Sharma, V.; She, Z.; Singh, M. K.; Sun, T. X.; Tang, C. J.; Tang, W. Y.; Tian, Y.; Wang, G. F.; Wang, L.; Wang, Q.; Wang, Y.; Wang, Y. X.; Wong, H. T.; Wu, S. Y.; Wu, Y. C.; Xing, H. Y.; Xu, R.; Xu, Y.; Xue, T.; Yan, Y. L.; Yeh, C. H.; Yi, N.; Yu, C. X.; Yu, H. J.; Yue, J. F.; Zeng, M.; Zeng, Z.; Zhang, B. T.; Zhang, F. S.; Zhang, L.; Zhang, Z. H.; Zhao, K. K.; Zhao, M. G.; Zhou, J. F.; Zhou, Z. Y.; Zhu, J. J.
Source
Phys. Rev. Lett. 129, 221301 (2022)
Subject
Language
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.
Comment: 6 pages, 3 figures. Version updated to match PRL version
Comment: 6 pages, 3 figures. Version updated to match PRL version