Exotic Dark Matter Search with the CDEX-10 Experiment at China’s Jinping Underground Laboratory

W. H. Dai(Tsinghua University), L. P. Jia(Tsinghua University), Haitao Ma(Tsinghua University), Q. Yue(Tsinghua University), K. Kang(Tsinghua University), Y. J. Li(Tsinghua University), Haipeng An(Nuctech (China)), C. Greeshma(Institute of Physics, Academia Sinica), Jianping Chang(Nuctech (China)), Y. H. Chen(Beijing Normal University), Jianping Cheng(Beijing Normal University), Z. Deng(Tsinghua University), C. H. Fang(Sichuan University), X. P. Geng(Tsinghua University), Haipeng Gong(Tsinghua University), Q. Guo(Peking University), X. Y. Guo(Yalong Hydro (China)), Long He(Nuctech (China)), S. M. He(Yalong Hydro (China)), J. Hu(China Institute of Atomic Energy), H. X. Huang(Sun Yat-sen University), T. Huang(Sun Yat-sen University), H. T. Jia(Sichuan University), Xi Jiang(Sichuan University), S. Karmakar(Institute of Physics, Academia Sinica), H. B. Li(Institute of Physics, Academia Sinica), J. M. Li(Sichuan University), J. Li(Tsinghua University), Q. Y. Li(Nankai University), R. M. J. Li(Sichuan University), X. Q. Li(Nankai University), Y. L. Li(Tsinghua University), Y. F. Liang(Tsinghua University), Bin Liao(Beijing Normal University), F. K. Lin(Sichuan University), S. T. Lin(Sichuan University), S. K. Liu(Sichuan University), Y. D. Liu(Sichuan University), Y. Liu(Sichuan University), Y. Y. Liu(Sichuan University), Ziyi Liu(Beijing Normal University), Yunlong Mao(Peking University), Q. Y. Nie(Tsinghua University), J. H. Ning(Yalong Hydro (China)), H. Pan(Nuctech (China)), Ningchun Qi(Yalong Hydro (China)), J. Ren(China Institute of Atomic Energy), Xichao Ruan(China Institute of Atomic Energy), Z. She(Tsinghua University), M. K. Singh(Institute of Physics, Academia Sinica), Tao Sun(Beijing Normal University), C. J. Tang(Sichuan University), W. Y. Tang(Tsinghua University), Y. Tian(Tsinghua University), G. F. Wang(Beijing Normal University), L. Wang(Beijing Normal University), Qing Wang(Tsinghua University), Y. Wang(Peking University), Yi Wang(Peking University), H. T. Wong(Institute of Physics, Academia Sinica), Yongcheng Wu(Yalong Hydro (China)), Y. C. Wu(Tsinghua University), H. Y. Xing(Sichuan University), R. Xu(Tsinghua University), Y. Xu(Nankai University), Tao Xue(Tsinghua University), Yu-Liang Yan(Sichuan University), L. T. Yang(Tsinghua University), Yi Nan(Tsinghua University), C. X. Yu(Nankai University), H. J. Yu(Yalong Hydro (China)), J. F. Yue(Yalong Hydro (China)), M. Zeng(Tsinghua University), Zhi Zeng(Tsinghua University), B. T. Zhang(Nagase ChemteX (Japan)), F. S. Zhang(Beijing Normal University), L. Zhang(Sichuan University), Z. H. Zhang(Tsinghua University), Z. Y. Zhang(Tsinghua University), K. K. Zhao(Nankai University), M. G. Zhao(Nankai University), J. F. Zhou(China Institute of Atomic Energy), Z. Zhou(China Institute of Atomic Energy), J. J. Zhu(Sichuan University)
Physical Review Letters
November 23, 2022
10.1103/physrevlett.129.221802
Cited by 22Open Access
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Abstract

A search for exotic dark matter (DM) in the sub-GeV mass range has been conducted using 205 kg day data taken from a p-type point contact germanium detector of the CDEX-10 experiment at China's Jinping underground laboratory. New low-mass dark matter searching channels, neutral current fermionic DM absorption (χ+A→ν+A) and DM-nucleus 3→2 scattering (χ+χ+A→ϕ+A), have been analyzed with an energy threshold of 160 eVee. No significant signal was found; thus new limits on the DM-nucleon interaction cross section are set for both models at the sub-GeV DM mass region. A cross section limit for the fermionic DM absorption is set to be 2.5×10^{-46} cm^{2} (90% C.L.) at DM mass of 10 MeV/c^{2}. For the DM-nucleus 3→2 scattering scenario, limits are extended to DM mass of 5 and 14 MeV/c^{2} for the massless dark photon and bound DM final state, respectively.

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