Limits on light weakly interacting massive particles from the CDEX-1 experiment with a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>-type point-contact germanium detector at the China Jinping Underground Laboratory

Q. Yue(Tsinghua University), Wen Zhao(Tsinghua University), K. Kang(Tsinghua University), J. Cheng(Tsinghua University), Y. J. Li(Tsinghua University), S. T. Lin(Sichuan University), Jianping Chang(Nuctech (China)), N. Chen(Tsinghua University), Q. H. Chen(Tsinghua University), Y. H. Chen(Yalong Hydro (China)), Y. C. Chuang(Institute of Physics, Academia Sinica), Z. Deng(Tsinghua University), Q. Du(Nankai University), Haipeng Gong(Tsinghua University), Xiaoyang Hao(Tsinghua University), H. He(Tsinghua University), Qingming He(Tsinghua University), Han‐Xiong Huang(China Institute of Atomic Energy), T. R. Huang(Institute of Physics, Academia Sinica), H. Jiang(Tsinghua University), H. B. Li(Institute of Physics, Academia Sinica), J. M. Li(Nuctech (China)), J. Li(Nuctech (China)), J. Li(Nuctech (China)), X. Li(Nankai University), X. Y. Li(Nankai University), Yan Li(Tsinghua University), H. Liao(Institute of Physics, Academia Sinica), F. K. Lin(Institute of Physics, Academia Sinica), S. K. Liu(Sichuan University), L. C. Lü(Tsinghua University), Hao Ma(Tsinghua University), Shijie Mao(Nuctech (China)), Jiangyi Qin(Tsinghua University), Jing Ren(China Institute of Atomic Energy), Jing Ren(China Institute of Atomic Energy), Xichao Ruan(China Institute of Atomic Energy), M. B. Shen(Yalong Hydro (China)), L. Singh(Institute of Physics, Academia Sinica), M. K. Singh(Institute of Physics, Academia Sinica), A. K. Soma(Institute of Physics, Academia Sinica), Jian Su(Tsinghua University), C. J. Tang(Sichuan University), C. H. Tseng(Institute of Physics, Academia Sinica), J. M. Wang(Yalong Hydro (China)), L. Wang(Tsinghua University), Qing Wang(Tsinghua University), H. T. Wong(Institute of Physics, Academia Sinica), Yongcheng Wu(Yalong Hydro (China)), Y. C. Wu(Nuctech (China)), Y. C. Wu(Nuctech (China)), Zhong-Zhi Xianyu(Tsinghua University), Rui-Qing Xiao(Tsinghua University), Haoyang Xing(Sichuan University), F. Z. Xu(Tsinghua University), Y. Xu(Nankai University), Xun-Jie Xu(Tsinghua University), T. Xue(Tsinghua University), L. T. Yang(Tsinghua University), S. W. Yang(Institute of Physics, Academia Sinica), Yi Nan(Tsinghua University), C. X. Yu(Nankai University), Hao Yu(Tsinghua University), Xun-Zhen Yu(Sichuan University), X. H. Zeng(Yalong Hydro (China)), Zhi Zeng(Tsinghua University), L. Zhang(Nuctech (China)), Y. H. Zhang(Yalong Hydro (China)), M. G. Zhao(Nankai University), Z. Y. Zhou(China Institute of Atomic Energy), J. J. Zhu(Sichuan University), W. B. Zhu(Nuctech (China)), X. Z. Zhu(Tsinghua University), Zhonghua Zhu(Yalong Hydro (China))
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology
November 10, 2014
10.1103/physrevd.90.091701
Cited by 106Open Access
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Abstract

We report results of a search for light dark matter weakly interacting massive particles (WIMPs) with CDEX-1 experiment at the China Jinping Underground Laboratory, based on 53.9 kg-days of data from a $p$-type point-contact germanium detector enclosed by a NaI(Tl) crystal scintillator as anti-Compton detector. The event rate and spectrum above the analysis threshold of 475 eVee are consistent with the understood background model. Part of the allowed regions for WIMP-nucleus coherent elastic scattering at WIMP mass of 6--20 GeV are probed and excluded. Independent of interaction channels, this result contradicts the interpretation that the anomalous excesses of the CoGeNT experiment are induced by dark matter, since identical detector techniques are used in both experiments.

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