Direct Dark Matter Search with XMASS-I
Masaki Yamashita (for the XMASS collaboration)

TL;DR
The XMASS-I experiment used liquid xenon to search for dark matter via annual modulation, setting new upper limits on WIMP interactions and excluding the DAMA/LIBRA region.
Contribution
This work presents the first annual modulation search with XMASS-I's liquid xenon detector, providing competitive upper limits on WIMP-nucleon cross sections.
Findings
No modulation signal was observed in the data.
Set an upper limit of 4.3×10⁻⁴¹ cm² at 8 GeV/c² WIMP mass.
Excluded the DAMA/LIBRA allowed region for dark matter detection.
Abstract
XMASS-I uses single phase liquid xenon technology for aiming at the direct detection of dark matter. The detector observes only scintillation light by 2 inch 642 PMTs which are placed in sphere shape around an active volume. With its large mass target and high photoelectron yield, we conducted a search for dark matter by annual modulation with 832 kg 359.2 days exposure of data. We find no modulation signal in the data so that we set an upper limit 4.3 at WIMP mass of 8 GeV/ which excluded an interpreted DAMA/LIBRA allowed region.
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Atomic and Subatomic Physics Research · Quantum, superfluid, helium dynamics
