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Limits on light WIMPs from the CDEX-1 experiment with a p-type point-contact germanium detector at the China Jingping Underground Laboratory

Authors :
Yue, Q.
Zhao, W.
Kang, K. J.
Cheng, J. P.
Li, Y. J.
Lin, S. T.
Chang, J. P.
Chen, N.
Chen, Q. H.
Chen, Y. H.
Chuang, Y. C.
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. M.
Li, J.
Li, X.
Li, X. Y.
Li, Y. L.
Liao, H. Y.
Lin, F. K.
Liu, S. K.
Lv, L. C.
Ma, H.
Mao, S. J.
Qin, J. Q.
Ren, J.
Ruan, X. C.
Shen, M. B.
Singh, L.
Singh, M. K.
Soma, A. K.
Su, J.
Tang, C. J.
Tseng, C. H.
Wang, J. M.
Wang, L.
Wang, Q.
Wong, H. T.
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, 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.
Source :
Phys. Rev. D 90, 091701 (2014)
Publication Year :
2014

Abstract

We report results of a search for light Dark Matter 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.<br />Comment: 5 pages, 5 figures

Subjects

Subjects :
High Energy Physics - Experiment
Physics - Instrumentation and Detectors

Details

Database :
arXiv
Journal :
Phys. Rev. D 90, 091701 (2014)
Publication Type :
Report
Accession number :
edsarx.1404.4946
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevD.90.091701
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