First underground results with NEWAGE-0.3a direction-sensitive dark matter detector

被引:64
|
作者
Miuchi, Kentaro [1 ]
Nishimura, Hironobu [1 ]
Hattori, Kaori [1 ]
Higashi, Naoki [1 ]
Ida, Chihiro [1 ]
Iwaki, Satoshi [1 ]
Kabuki, Shigeto [1 ]
Kubo, Hidetoshi [1 ]
Kurosawa, Shunsuke [1 ]
Nakamura, Kiseki [1 ]
Parker, Joseph [1 ]
Sawano, Tatsuya [1 ]
Takahashi, Michiaki [1 ]
Tanimori, Toru [1 ]
Taniue, Kojiro [1 ]
Ueno, Kazuki [1 ]
Sekiya, Hiroyuki [2 ]
Takeda, Atsushi [2 ]
Tsuchiya, Ken'ichi [3 ]
Takada, Atsushi [4 ]
机构
[1] Kyoto Univ, Grad Sch Sci, Dept Phys, Cosm Ray Grp,Sakyo Ku, Kyoto 6068502, Japan
[2] Univ Tokyo, ICRR, Kamioka Observ, Kamioka, Hida 5061205, Japan
[3] Natl Res Inst Police Sci, Kashiwa, Chiba 2770882, Japan
[4] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sci Balloon Lab, Sagamihara, Kanagawa 2298510, Japan
关键词
Time projection chamber; Micro pattern detector; Dark matter; WIMP; Direction-sensitive; WIMP; SEARCH;
D O I
10.1016/j.physletb.2010.02.028
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A direction-sensitive dark matter search experiment at Kamioka underground laboratory with the NEWAGE-0 3a detector was performed The NEWAGE-0 3a detector is a gaseous micro-time-projection chamber filled With CF4 gas at 152 Torr. The fiducial Volume and target mass are 20 x 25 x 31 cm(3) and 0 0115 kg. respectively. With an exposure of 0 524 kg days, improved spin-dependent weakly interacting massive particle (WIMP)-proton cross section limits by a direction-sensitive method were achieved Including a new record of 5400 pb for 150 GeV/c(2) WIMPs We studied the remaining background and found that ambient gamma-rays contributed about one-fifth of the remaining background and radioactive contaminants inside the gas chamber contributed the rest. (C) 2010 Elsevier B V All rights reserved
引用
收藏
页码:11 / 17
页数:7
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