Search for WIMP-${}^{129}$Xe inelastic scattering with particle identification in XMASS-I

Abstract

A search for Weakly Interacting Massive Particles (WIMPs) was conducted with the single-phase liquid-xenon detector XMASS through inelastic scattering in which ${}^{129}$Xe nuclei were excited, using an exposure ($327\mathrm{kg}\times 800.0\mathrm{days}$) 48 times larger than that of our previous study. The inelastic excitation sensitivity was improved by detailed evaluation of background, event classification based on scintillation timing that distinguished $\gamma$-rays and $\beta$-rays, and simultaneous fitting of the energy spectra of $\gamma$-like and $\beta$-like samples. No evidence of a WIMP signal was found. Thus, we set the upper limits of the inelastic channel cross section at 90\% confidence level, for example, $4.1\times 10^{-39}\mathrm{c}{\mathrm{m}}^2$ for a $200\mathrm{GeV}/c^2$ WIMP. This result provides the most stringent limits on the SD WIMP-neutron interaction and is better by a factor of 7.7 at $200\mathrm{GeV}/c^2$ than the existing experimental limit.

arXiv comment8 pages, 10 figures

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Cited by in corpus (12)

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• Converged ab initio calculations of heavy nuclei
• Dark Shards: velocity substructure from Gaia and direct searches for dark matter
• Search for inelastic scattering of WIMP dark matter in XENON1T
• A new mechanism for matter-antimatter asymmetry and connection with dark matter
• Dark Matter Bound State Formation in Fermionic $Z_2$ DM model with Light Dark Photon and Dark Higgs Boson
• Inelastic dark matter nucleus scattering
• Direct dark matter searches with the full data set of XMASS-I
• Search for inelastic WIMP-iodine scattering with COSINE-100
• Development of low-background photomultiplier tubes for liquid xenon detectors
• MSSM WIMPs-nucleon cross section for E${}_{\chi }<$ 500 GeV
• Search for neutrinoless quadruple beta decay of ${}^{136}$Xe in XMASS-I