Limits on Spin-Independent Couplings of WIMP Dark Matter with a p-Type Point-Contact Germanium Detector
- Shen, Y. T.
- Li, Y. J.
- Tang, C. J.
- Tseng, C. H.
- Li, J. M.
- Liu, Y. F.
- Ma, H.
- Li, H. B.
- Li, Y. L.
- Liao, H. Y.
- Lin, S. T.
- Liu, S. K.
- Singh, L.
- Singh, M. K.
- Soma, A. K.
- Wong, H. T.
- Wu, Y. C.
- DENİZ, MUHAMMED
- Zhou, Z. Y.
- Zeyrek, M.
- Zhao, W.
- Asryan, G.
- Chuang, Y. C.
- Li, J.
- Fang, J. M.
- Hsu, C. L.
- Singh, V.
- Huang, T. R.
- Xu, Y.
- Yang, S. W.
- Kumar, G. Kiran
- Lin, F. K.
- Lee, S. C.
- Ruan, X. C.
- Zeng, Z.
- Yue, Q.
- Yu, C. X.
- Lin, C. W.
Publication date
June 2013
DOIAbstract
We report new limits on a spin-independent weakly interacting massive particle (WIMP)-nucleon interaction cross section using 39.5 kg days of data taken with a p-type point-contact germanium detector of 840 g fiducial mass at the Kuo-Sheng Reactor Neutrino Laboratory. Crucial to this study is the understanding of the selection procedures and, in particular, the bulk-surface events differentiation at the sub-keV range. The signal-retaining and background-rejecting efficiencies were measured with calibration gamma sources and a novel n-type point-contact germanium detector. Part of the parameter space in the cross section versus WIMP-mass implied by various experiments is probed and excluded
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