1. Limits on spin-independent couplings of WIMP dark matter with a p-type point-contact germanium detector
- Author
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DENİZ, MUHAMMED, Zhou, Z. Y., Zeyrek, M., Zeng, Z., Yue, Q., Yu, C. X., Yang, S. W., Xu, Y., Tseng, C. H., Tang, C. J., Singh, V., Shen, Y. T., Ruan, X. C., Ma, H., Liu, Y. F., Lin, F. K., Lin, C. W., Li, Y. L., Li, Y. J., Li, J. M., Li, J., Lee, S. C., Kumar, G. Kiran, Chuang, Y. C., Li, H. B., Liao, H. Y., Lin, S. T., Liu, S. K., Singh, L., Singh, M. K., Soma, A. K., Wong, H. T., Wu, Y. C., Huang, T. R., Hsu, C. L., Zhao, W., Asryan, G., and Fang, J. M.
- Subjects
Coupling ,Physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Physics - Instrumentation and Detectors ,010308 nuclear & particles physics ,Physics::Instrumentation and Detectors ,Dark matter ,FOS: Physical sciences ,General Physics and Astronomy ,Instrumentation and Detectors (physics.ins-det) ,Parameter space ,01 natural sciences ,Particle detector ,Semiconductor detector ,High Energy Physics - Experiment ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,WIMP ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics ,Background radiation ,Spin-½ ,Astrophysics - Cosmology and Nongalactic Astrophysics - 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., 4 pages, 4 figures ; Published Version as V2
- Published
- 2013