Dark matter substructures affect dark matter-electron scattering in xenon-based direct detection experiments

Abstract

Recent sky surveys have discovered a large number of stellar substructures. It is highly likely that there are dark matter (DM) counterparts to these stellar substructures. We examine the implications of DM substructures for electron recoil (ER) direct detection (DD) rates in dual phase xenon experiments. We have utilized the results of the LAMOST survey and considered a few benchmark substructures in our analysis. Assuming that these substructures constitute $\sim 10\%$ of the local DM density, we study the discovery limits of DM-electron scattering cross sections considering one kg-year exposure and 1, 2, and 3 electron thresholds. With this exposure and threshold, it is possible to observe the effect of the considered DM substructure for the currently allowed parameter space. We also explore the sensitivity of these experiments in resolving the DM substructure fraction. For all the considered cases, we observe that DM having mass $\mathcal{O}(10)$MeV has a better prospect in resolving substructure fraction as compared to $\mathcal{O}(100)$MeV scale DM. We also find that within the currently allowed DM-electron scattering cross-section; these experiments can resolve the substructure fraction (provided it has a non-negligible contribution to the local DM density) with good accuracy for $\mathcal{O}(10)$MeV DM mass with one electron threshold.

31 pages, 10 figures. Matches published version

References in corpus (25)

• Properties of galaxies reproduced by a hydrodynamic simulation
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• Evidence from the H3 Survey that the Stellar Halo is Entirely Comprised of Substructure
• An Orphan in the "Field of Streams"
• Searching for low-mass dark matter particles with a massive Ge bolometer operated above-ground
• Phase-space structure in the local dark matter distribution and its signature in direct detection experiments
• Semiconductor Probes of Light Dark Matter
• The Astrophysical Uncertainties Of Dark Matter Direct Detection Experiments
• Annual Modulation of Dark Matter in the Presence of Streams
• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• Halo Substructure in the SDSS-Gaia Catalogue : Streams and Clumps
• The local high velocity tail and the Galactic escape speed
• First results on dark matter annual modulation from ANAIS-112 experiment
• An experiment to search for dark matter interactions using sodium iodide detectors
• Investigating halo substructures with annual modulation signature
• The Gaia DR3 view of dynamical substructure in the stellar halo near the Sun
• Dark Matter Direct Search Rates in Simulations of the Milky Way and Sagittarius Stream
• Taking Halo-Independent Dark Matter Methods Out of the Bin
• Blazar-Boosted Dark Matter at Super-Kamiokande
• Energy wrinkles and phase-space folds of the last major merger
• Dependence of Dark Matter - Electron Scattering on the Galactic Dark Matter Velocity Distribution
• Detecting Beyond the Standard Model Interactions of Solar Neutrinos in Low-Threshold Dark Matter Detectors
• Electron scattering of light new particles from evaporating primordial black holes
• Assessing Compatibility of Direct Detection Data: Halo-Independent Global Likelihood Analyses
• Halo-independence with quantified maximum entropy at DAMA/LIBRA

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• Deciphering the Kinematic Substructure of Local Dark Matter with LAMOST K Giants
• Probing the Dark Matter Capture Rate in a Local Population of Brown Dwarfs with IceCube Gen 2
• Information divergences to parametrize astrophysical uncertainties in dark matter direct detection
• Information-theoretic astrophysical uncertainties in the effective theory of dark matter direct detection