A direct dark matter search in XMASS-I

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 97 kg of liquid xenon at the center of the detector. The event rate in the fiducial volume after the data reduction was $(4.2\pm 0.2)\times 10^{-3}\mathrm{da}{\mathrm{y}}^{-1}\mathrm{k}{\mathrm{g}}^{-1}\mathrm{ke}{\mathrm{V}}_{\mathrm{ee}}^{-1}$ at $5\mathrm{ke}{\mathrm{V}}_{\mathrm{ee}}$, with a signal efficiency of $20\%$. All the remaining events are consistent with our background evaluation, mostly of the "mis-reconstructed events" originated from ${}^{210}$Pb in the copper plates lining the detector's inner surface. The obtained upper limit on a spin-independent WIMP-nucleon cross section was $2.2\times 10^{-44}\mathrm{c}{\mathrm{m}}^2$ for a WIMP mass of $60GeV/{\mathrm{c}}^2$ at the $90\%$ confidence level, which was the most stringent limit among results from single-phase liquid xenon detectors.

arXiv comment16 pages, 8 figures

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• Annual Modulation in Direct Dark Matter Searches
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• Development of low radioactivity photomultiplier tubes for the XMASS-I detector
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• Direct dark matter searches with the full data set of XMASS-I
• Evaluation of cosmogenic production of ${}^{39}Ar$ and ${}^{42}Ar$ for rare-event physics using underground argon
• Impact of Dark Compton Scattering on Direct Dark Matter Absorption Searches
• Development of low-background photomultiplier tubes for liquid xenon detectors
• Detection and Calibration of Low-Energy Nuclear Recoils for Dark Matter and Neutrino Scattering Experiments
• The role of small scale experiments in the direct detection of dark matter
• The dark Stodolsky effect: constraining effective dark matter operators with spin-dependent interactions
• Constraining neutrino electromagnetic properties with recent low-energy electron recoil data at dark matter direct detection experiments
• MSSM WIMPs-nucleon cross section for E${}_{\chi }<$ 500 GeV
• Search for neutrinoless quadruple beta decay of ${}^{136}$Xe in XMASS-I
• Identification of new isomers in ${}^{228}$Ac : Impact on dark matter searches
• Scintillation light increase of carbontetrafluoride gas at low temperature
• State of the Art in Direct Dark Matter Detectors: Technologies, Performance, and Future Directions
• Dark Matter Phenomenology: Sterile Neutrino Portal and Gravitational Portal in Extra-Dimensions