Limits on Spin-Independent Couplings of WIMP Dark Matter with a p-Type Point-Contact Germanium Detector

Li, H.; Liao, H.; Lin, S.; Liu, S.; Singh, L.; Singh, M.; Soma, A.; Wong, H.; Wu, Y.; Zhao, W.; Asryan, G.; Chuang, Y.; DENİZ, MUHAMMED; Fang, J.; Hsu, C.; Huang, T.; Kumar, G.; Lee, S.; Li, J.; Li, J.; Li, Y.; Li, Y.; Lin, C.; Lin, F.; Liu, Y.; Ma, H.; Ruan, X.; Shen, Y.; Singh, V.; Tang, C.; Tseng, C.; Xu, Y.; Yang, S.; Yu, C.; Yue, Q.; Zeng, Z.; Zeyrek, M.; Zhou, Z.

doi:10.1103/physrevlett.110.261301

Limits on Spin-Independent Couplings of WIMP Dark Matter with a p-Type Point-Contact Germanium Detector

Li H. B., Liao H. Y., Lin S. T., Liu S. K., Singh L., Singh M. K., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.110, sa.26, 2013 (SCI-Expanded, Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 110 Sayı: 26
Basım Tarihi: 2013
Doi Numarası: 10.1103/physrevlett.110.261301
Dergi Adı: PHYSICAL REVIEW LETTERS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Dokuz Eylül Üniversitesi Adresli: Evet

Özet

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.