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Constraints on ultraheavy dark matter from the CDEX-10 experiment at the China Jinping Underground Laboratory

Y. F. Wang1, L. T. Yang1,*, Q. Yue1,†, K. J. Kang1, Y. J. Li1, H. P. An1,2, Greeshma C.3,‡, J. P. Chang4, H. Chen1 et al. (CDEX Collaboration)

H. Chen1, Y. H. Chen5, J. P. Cheng1,6, J. Y. Cui1, W. H. Dai1, Z. Deng1, Y. X. Dong1, C. H. Fang7, H. Gong1, Q. J. Guo8, T. Guo1, X. Y. Guo5, L. He4, J. R. He5, H. X. Huang9, T. C. Huang10, S. Karmakar3,‡, Y. S. Lan1, H. B. Li3,‡, H. Y. Li7, J. M. Li1, J. Li1, M. C. Li5, Q. Y. Li7, R. M. J. Li7, X. Q. Li11, Y. L. Li1, Y. F. Liang1, B. Liao6, F. K. Lin3,‡, S. T. Lin7, J. X. Liu1, R. Z. Liu1, S. K. Liu7, Y. D. Liu6, Y. Liu7, Y. Y. Liu6, H. Ma1, Y. C. Mao8, A. Mureed7, H. Pan4, N. C. Qi5, J. Ren9, X. C. Ruan9, M. B. Shen5, H. Y. Shi7, M. K. Singh3,12,‡, T. X. Sun6, W. L. Sun5, C. J. Tang7, Y. Tian1, H. F. Wan1, G. F. Wang6, J. Z. Wang1, L. Wang6, Q. Wang7, Q. Wang1,2, Y. X. Wang8, H. T. Wong3,‡, Y. C. Wu1, H. Y. Xing7, K. Z. Xiong5, R. Xu1, Y. Xu11, T. Xue1, Y. L. Yan7, N. Yi1, C. X. Yu11, H. J. Yu4, X. Yu1, M. Zeng1, Z. Zeng1, F. S. Zhang6, P. Zhang1, P. Zhang5, Z. Y. Zhang1, M. G. Zhao11, J. F. Zhou5, Z. Y. Zhou9, and J. J. Zhu7 (CDEX Collaboration)

  • 1Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084
  • 2Department of Physics, Tsinghua University, Beijing 100084
  • 3Institute of Physics, Academia Sinica, Taipei 11529
  • 4NUCTECH Company, Beijing 100084
  • 5YaLong River Hydropower Development Company, Chengdu 610051
  • 6School of Physics and Astronomy, Beijing Normal University, Beijing 100875
  • 7College of Physics, Sichuan University, Chengdu 610065
  • 8School of Physics, Peking University, Beijing 100871
  • 9Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413
  • 10Sino-French Institute of Nuclear and Technology, Sun Yat-sen University, Zhuhai 519082
  • 11School of Physics, Nankai University, Tianjin 300071
  • 12Department of Physics, Banaras Hindu University, Varanasi 221005

  • *Contact author: yanglt@mail.tsinghua.edu.cn
  • †Contact author: yueq@mail.tsinghua.edu.cn
  • ‡Participating as a member of TEXONO Collaboration.
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Phys. Rev. D 113, 052011 – Published 26 March, 2026

DOI: https://doi.org/10.1103/19fr-wcty

Abstract

We report a search for ultraheavy dark matter (UHDM) with the CDEX-10 experiment at the China Jinping Underground Laboratory. Using a Monte Carlo framework that incorporates Earth shielding effects, we simulated UHDM propagation and energy deposition in p-type point-contact germanium detectors. Analysis of 205.4  kg·day exposure in the 0.16–4.16 keVee range showed no excess above background. Our results exclude the spin-independent UHDM-nucleon scattering with two cross section scales, with the UHDM mass from 106 to 1011  GeV, and provide the most stringent constraints with solid-state detectors below 108  GeV.

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Phys. Rev. D 113, 052011– Published 26 March, 2026
  • Received 31 October 2025
  • Accepted 11 March 2026
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