Direct Detection Anomalies in light of $Gaia$ Data

Abstract

Measurements from the Gaia satellite have greatly increased our knowledge of the dark matter velocity distributions in the Solar neighborhood. There is evidence for multiple cold structures nearby, including a high-velocity stream counterrotating relative to the Sun. This stream could significantly alter the spectrum of recoil energies and increase the annual modulation of dark matter in direct detection experiments such as DAMA/Libra. We reanalyze the experimental limits from Xenon1T, CDMSlite, PICO-60 and COSINE-100, and compare them to the results of the DAMA/Libra experiment. While we find that this new component of the dark matter velocity distribution can greatly improve the fit to the DAMA/Libra data, both spin-independent and spin-dependent interpretations of the DAMA/Libra signal with elastic and inelastic scattering continue to be ruled out by the null results of other experiments, in particular Xenon1T.

arXiv comment23 pages, 17 figures, updated references. Version published in PRD

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Cited by in corpus (9)

• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• Cosmological Constraints on Dark Matter Interactions with Ordinary Matter
• Dark Shards: velocity substructure from Gaia and direct searches for dark matter
• The highest-speed local dark matter particles come from the Large Magellanic Cloud
• Comparison between DAMA/LIBRA and COSINE-100 in the light of Quenching Factors
• Implications of the Gaia Sausage for Dark Matter Nuclear Interactions
• Solar neutrinos and dark matter detection with diurnal modulation
• Dark matter substructures affect dark matter-electron scattering in xenon-based direct detection experiments
• Dark Matter Substructure under the Electron Scattering Lamppost