First results on low-mass WIMPs from the CDEX-1 experiment at the China Jinping underground laboratory
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology2013Vol. 88(5)
Citations Over TimeTop 10% of 2013 papers
Wen Zhao, Qian Yue, K. Kang, Jianping Cheng, Y. J. Li, S. T. Lin, Y. Bai, Yong Bi, Jianping Chang, Nanting Chen, Nanting Chen, Q. H. Chen, Y. H. Chen, Y. C. Chuang, Z. Deng, Chenyu Du, Qixiu Du, H. Gong, X. Q. Hao, H. He, Qingming He, Xinting Hu, Han‐Xiong Huang, T. R. Huang, Hao Jiang, H. B. Li, J. M. Li, J. Li, J. Li, X. Li, X. Y. Li, Y. L. Li, H. Liao, F. K. Lin, S. K. Liu, L. C. Lü, Hao Ma, Shijie Mao, Jiangyi Qin, Jing Ren, J. Ren, Xichao Ruan, M. B. Shen, L. Singh, M. K. Singh, A. K. Soma, J. Su, C. J. Tang, C. H. Tseng, J. M. Wang, L. Wang, Qing Wang, H. T. Wong, Yongcheng Wu, Wei Wu, Y. C. Wu, Y. C. Wu, Zhong-Zhi Xianyu, H. Xing, Y. Xu, Xun-Jie Xu, Tao Xue, L. T. Yang, S. W. Yang, Yi Nan, C. X. Yu, H. J. Yu, Xun-Zhen Yu, X. H. Zeng, Zhi Zeng, L. Zhang, Y. H. Zhang, M. G. Zhao, Su-Ning Zhong, Z. Zhou, J. J. Zhu, W. B. Zhu, X. Z. Zhu, Zhonghua Zhu
Abstract
The China Dark Matter Experiment Collaboration reports the first experimental limit on weakly interacting massive particles (WIMPs) dark matter from 14.6 kg-days of data taken with a 994 g p-type point-contact germanium detector at the China Jinping underground laboratory where the rock overburden is more than 2400 m. The energy threshold achieved was 400 eVee. According to the 14.6 kg-day live data, we placed the limit of ${\ensuremath{\sigma}}_{\ensuremath{\chi}N}=1.75\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}40}\text{ }\text{ }{\mathrm{cm}}^{2}$ at a 90% confidence level on the spin-independent cross section at a WIMP mass of 7 GeV before differentiating bulk signals from the surface backgrounds.
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