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ID 114587
著者
Abe, K. The University of Tokyo
Hiraide, K. The University of Tokyo
Ichimura, K. The University of Tokyo
Kishimoto, Y. The University of Tokyo
Kobayashi, K. The University of Tokyo
Kobayashi, M. The University of Tokyo
Moriyama, S. The University of Tokyo
Nakahata, M. The University of Tokyo
Norita, T. The University of Tokyo
Ogawa, H. The University of Tokyo|Nihon University
Sato, K. The University of Tokyo
Sekiya, H. The University of Tokyo
Takachio, O. The University of Tokyo
Takeda, A. The University of Tokyo
Tasaka, S. The University of Tokyo
Yamashita, M. The University of Tokyo
Yang, B.S. The University of Tokyo|Institute for Basic Science
Kim, N.Y. Institute for Basic Science
Kim, Y.D. Institute for Basic Science
Itow, Y. Nagoya University
Kanzawa, K. Nagoya University
Kegasa, R. Nagoya University
Masuda, K. Nagoya University
Takiya, H. Nagoya University
Kanzaki, G. The University of Tokushima
Martens, K. The University of Tokyo
Suzuki, Y. The University of Tokyo
Xu, B.D. The University of Tokyo
Fujita, R. Kobe University
Hosokawa, K. Kobe University|Tohoku University
Miuchi, K. Kobe University
Oka, N. Kobe University
Takeuchi, Y. Kobe University|The University of Tokyo
Kim, Y.H. Korea Research Institute of Standards and Science|Institute for Basic Science
Lee, K.B. Korea Research Institute of Standards and Science
Lee, M.K. Korea Research Institute of Standards and Science
Fukuda, Y. Miyagi University of Education
Miyasaka, M. Tokai University
Nishijima, K. Tokai University
Nakamura, S. Yokohama National University
キーワード
Dark matter
Low background
Liquid xenon
資料タイプ
学術雑誌論文
抄録
A search for dark matter using an underground single-phase liquid xenon detector was conducted at the Kamioka Observatory in Japan, particularly for Weakly Interacting Massive Particles (WIMPs). We have used 705.9 live days of data in a fiducial volume containing 97 kg of liquid xenon at the center of the detector. The event rate in the fiducial volume after the data reduction was (4.2 ± 0.2) × 10−3 day−1 kg−1 keVee−1 at 5 keVee, with a signal efficiency of 20%. All the remaining events are consistent with our background evaluation, mostly of the “mis-reconstructed events” originated from 210Pb in the copper plates lining the detector’s inner surface. The obtained upper limit on a spin-independent WIMP-nucleon cross section was 2.2 × 10−44 cm2 for a WIMP mass of 60 GeV/c2 at the 90% confidence level, which was the most stringent limit among results from single-phase liquid xenon detectors.
掲載誌名
Physics Letters B
ISSN
03702693
cat書誌ID
AA11537044
AA00774026
出版者
Elsevier
789
開始ページ
45
終了ページ
53
発行日
2018-12-05
権利情報
This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
出版社版
部局
理工学系