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arXiv · 1303.0925

Limits on spin-independent couplings of WIMP dark matter with a p-type point-contact germanium detector

TEXONO Collaboration
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Abstract

We report new limits on spin-independent 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 cross-section versus WIMP-mass implied by various experiments is probed and excluded.

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TEXONO Collaboration. 2013-03-05. Limits on spin-independent couplings of WIMP dark matter with a p-type point-contact germanium detector. https://doi.org/10.1103/physrevlett.110.261301

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