First results from dark matter search experiment in the Nokogiriyama underground cell

被引:22
作者
Ootani, W
Minowa, M
Miuchi, K
Inoue, Y
Watanabe, T
Yoshida, M
Ito, Y
Ootuka, Y
机构
[1] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
[2] Univ Tokyo, Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
[3] Univ Tokyo, Sch Sci, Res Ctr Early Universe, RESCEU,Bunkyo Ku, Tokyo 1130033, Japan
[4] Int Ctr Elementary Particle Phys, Bunkyo Ku, Tokyo 1130033, Japan
[5] Univ Tokyo, Cryogen Ctr, Bunkyo Ku, Tokyo 1130033, Japan
关键词
dark matter; bolometer; WIMPs; neutralino; LiF;
D O I
10.1016/S0370-2693(99)00889-8
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
An experiment to search for hypothetical particle dark matter using cryogenic thermal detector, or bolometer is ongoing. The bolometer consists of eight pieces of 21 g LiF absorbers and sensitive NTD germanium thermistors attached to them and is installed in the Nokogiriyama underground cell which is a shallow depth site (similar to 15 m w.e.). We report on the results from the first running for about ten days using this arrayed bolometer system together with appropriate shieldings and muon veto counters. From the obtained energy spectra the exclusion limits for the cross section of the elastic neutralino-proton scattering are derived under commonly accepted astrophysical assumptions. The sensitivity for the light neutralino with a mass below 5 GeV is improved by this work. (C) 1999 Published by Elsevier Science B,V. All rights reserved.
引用
收藏
页码:371 / 375
页数:5
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