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

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arxiv 1601.04581 v1 pith:ASMJXKM3 submitted 2016-01-18 hep-ex physics.ins-det

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

W. Zhao , Q. Yue , K.J. Kang , J.P. Cheng , Y.J. Li , H.T. Wong , S.T. Lin , J.P. Chang
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J.H. Chen Q.H. Chen Y.H. Chen Z. Deng Q. Du H. Gong X.Q. Hao H.J. He Q.J. He H.X. Huang T.R. Huang H. Jiang H.B. Li J. Li J.M. Li X. Li X.Y. Li Y.L. Li F.K. Lin S.K. Liu L.C. L\"u H. Ma J.L. Ma S.J. Mao J.Q. Qin J. Ren X.C. Ruan V. Sharma M.B. Shen L. Singh M.K. Singh A.K. Soma J. Su C.J. Tang J.M. Wang L. Wang Q. Wang S.Y. Wu Y.C. Wu Z.Z. Xianyu R.Q. Xiao H.Y. Xing F.Z. Xu Y. Xu X.J. Xu T. Xue L.T. Yang S.W. Yang N. Yi C.X. Yu H. Yu X.Z. Yu M. Zeng X.H. Zeng Z. Zeng L. Zhang Y.H. Zhang M.G. Zhao Z.Y. Zhou J.J. Zhu W.B. Zhu X.Z. Zhu Z.H. Zhu
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classification hep-ex physics.ins-det
keywords detectorexperimentanalysiscdex-1datagermaniumlow-massp-type
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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