First results from dark matter search experiment in the Nokogiriyama underground cell |
| |
| Institution: | 1. RIKEN, The Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;2. Department of Physics, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;3. RESCEU, Research Center for the Early Universe, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;4. International Center for Elementary Particle Physics, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;5. Cryogenic Center, University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-0033, Japan;1. İstanbul Technical University, Faculty of Aeronautics and Astronautics, Maslak, Istanbul, Turkey;2. University of Colorado, Department of Electrical, Computer and Energy Engineering, Boulder, CO, USA;3. Scion Associates, Port Townsend, WA, USA |
| |
| Abstract: | 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 (∼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. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
