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

Kentaro Miuchi, Hironobu Nishimura, Kaori Hattori, Naoki Higashi, Chihiro Ida, Satoshi Iwaki, Shigeto Kabuki, Hidetoshi Kubo, Shunsuke Kurosawa, Kiseki Nakamura, Joseph Parker, Tatsuya Sawano, Michiaki Takahashi, Toru Tanimori, Kojiro Taniue, Kazuki Ueno, Hiroyuki Sekiya, Atsushi Takeda, Ken'ichi Tsuchiya, Atsushi Takada

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)

Abstract

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 × 25 × 31 cm3 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/ c2 WIMPs. We studied the remaining background and found that ambient γ-rays contributed about one-fifth of the remaining background and radioactive contaminants inside the gas chamber contributed the rest.

Original languageEnglish
Pages (from-to)11-17
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume686
Issue number1
DOIs
Publication statusPublished - 2010 Mar 15
Externally publishedYes

Keywords

  • Dark matter
  • Direction-sensitive
  • Micro pattern detector
  • Time projection chamber
  • WIMP

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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