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; 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. Lü; 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

doi:10.1103/physrevd.93.092003

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arXiv · 1601.04581

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

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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.

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W. Zhao, Q. Yue, K. J. Kang, J. P. Cheng, Y. J. Li, H. T. Wong, S. T. Lin, J. P. Chang, 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. Lü, 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. 2016-01-18. A Search of Low-Mass WIMPs with p-type Point Contact Germanium Detector in the CDEX-1 Experiment. https://doi.org/10.1103/physrevd.93.092003

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