Direct dark matter search by annual modulation with 2.7 years of XMASS-I data

Abstract

An annual modulation signal due to the Earth orbiting around the Sun would be one of the strongest indications of the direct detection of dark matter. In 2016, we reported a search for dark matter by looking for this annual modulation with our single-phase liquid xenon XMASS-I detector. That analysis resulted in a slightly negative modulation amplitude at low energy. In this work, we included more than one year of additional data, which more than doubles the exposure to 800 live days with the same 832 kg target mass. When we assume weakly interacting massive particle (WIMP) dark matter elastically scattering on the xenon target, the exclusion upper limit for the WIMP-nucleon cross section was improved by a factor of 2 to 1.9$\times$10${}^{-41}$cm${}^2$ at 8 GeV/c${}^2$ at 90\% confidence level with our newly implemented data selection through a likelihood method. For the model-independent case, without assuming any specific dark matter model, we obtained more consistency with the null hypothesis than before with a $p$-value of 0.11 in the 1$-$20 keV energy region. This search probed this region with an exposure that was larger than that of DAMA/LIBRA. We also did not find any significant amplitude in the data for periodicity with periods between 50 and 600 days in the energy region between 1 to 6 keV.

arXiv comment10 pages, 11 figures

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Cited by in corpus (25)

• Results of a Search for Sub-GeV Dark Matter Using 2013 LUX Data
• Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment
• First results on dark matter annual modulation from ANAIS-112 experiment
• Annual modulation results from three-year exposure of ANAIS-112
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• Annual Modulation in Direct Dark Matter Searches
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• A direct dark matter search in XMASS-I
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• Search for dark matter in the form of hidden photons and axion-like particles in the XMASS detector
• Monte Carlo simulation of the SABRE PoP background
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• Search for sub-GeV dark matter by annual modulation using XMASS-I detector
• Development of low radioactivity photomultiplier tubes for the XMASS-I detector
• Simulation and background characterisation of the SABRE South experiment
• Direct dark matter searches with the full data set of XMASS-I
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• The DireXeno Experiment -- Measuring Correlated Scintillation Signatures in Liquid Xenon
• NaI(Tl) crystal scintillator encapsulated in two organic-scintillator layers with pulse shape data analysis
• State of the Art in Direct Dark Matter Detectors: Technologies, Performance, and Future Directions