A Search of Low-Mass WIMPs with p-type Point Contact Germanium Detector in the CDEX-1 Experiment

Authors :: Zhao, W.
Yue, Q.
Kang, K. J.
Cheng, J. P.
Li, Y. J.
Wong, H. T.
Lin, S. T.
Chang, J. P.
Chen, J. H.
Chen, Q. H.
Chen, Y. H.
Deng, Z.
Du, Q.
Gong, H.
Hao, X. Q.
He, H. J.
He, Q. J.
Huang, H. X.
Huang, T. R.
Jiang, H.
Li, H. B.
Li, J.
Li, J. M.
Li, X.
Li, X. Y.
Li, Y. L.
Lin, F. K.
Liu, S. K.
Lü, L. C.
Ma, H.
Ma, J. L.
Mao, S. J.
Qin, J. Q.
Ren, J.
Ruan, X. C.
Sharma, V.
Shen, M. B.
Singh, L.
Singh, M. K.
Soma, A. K.
Su, J.
Tang, C. J.
Wang, J. M.
Wang, L.
Wang, Q.
Wu, S. Y.
Wu, Y. C.
Xianyu, Z. Z.
Xiao, R. Q.
Xing, H. Y.
Xu, F. Z.
Xu, Y.
Xu, X. J.
Xue, T.
Yang, L. T.
Yang, S. W.
Yi, N.
Yu, C. X.
Yu, H.
Yu, X. Z.
Zeng, M.
Zeng, X. H.
Zeng, Z.
Zhang, L.
Zhang, Y. H.
Zhao, M. G.
Zhou, Z. Y.
Zhu, J. J.
Zhu, W. B.
Zhu, X. Z.
Zhu, Z. H.
Publication Year :: 2016
Abstract: The CDEX-1 experiment conducted a search of low-mass (< 10 GeV/c2) Weakly Interacting Massive Particles (WIMPs) dark matter at the China Jinping Underground Laboratory using a p-type point-contact germanium detector with a fiducial mass of 915 g at a physics analysis threshold of 475 eVee. We report the hardware set-up, detector characterization, data acquisition and analysis procedures of this experiment. No excess of unidentified events are observed after subtraction of known background. Using 335.6 kg-days of data, exclusion constraints on the WIMP-nucleon spin-independent and spin-dependent couplings are derived.<br />12 pages, 19 figures

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