First limit on WIMP cross section with low background CsI(Tℓ) crystal detector

DMRC and School of Physics, Seoul National University, Seoul 151-742, South Korea; Department of Physics, Sejong University, Seoul 143-747, South Korea; Physics Department, Yonsei University, Seoul 120-749, South Korea; Department of Science Education, Ewha Womans University, Seoul 120-750, South Korea; Physics Department, Kyungpook National University, Daegu 702-701, South Korea; Department of Engineering Physics, Tsinghua University, Beijing 100084, China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
Physics Letters B 10/2005; DOI: 10.1016/j.physletb.2005.12.035
Source: arXiv

ABSTRACT The Korea Invisible Mass Search (KIMS) Collaboration has been carrying out WIMP search experiment with CsI(Tℓ) crystal detectors at the YangYang Underground Laboratory. A successful reduction of the internal background of the crystal was done and a good pulse shape discrimination was achieved. We report the first result on WIMP search obtained with 237 kg days data using one full-size CsI(Tℓ) crystal of 6.6 kg mass.


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May 21, 2014