A direct dark matter search in XMASS-I

XMASS Collaboration

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

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 97kg 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)×10−3day−1kg−1keVee −1 at 5keVee, 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 2.2×10−44cm2 for a WIMP mass of 60GeV/c2 at the 90% confidence level, which was the most stringent limit among results from single-phase liquid xenon detectors.

Original languageEnglish
Pages (from-to)45-53
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume789
DOIs
Publication statusPublished - 2019 Feb 10
Externally publishedYes

Keywords

  • Dark matter
  • Liquid xenon
  • Low background

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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