Halo uncertainties in electron recoil events at direct detection experiments

Abstract

The dark matter direct detection rates are highly correlated with the phase space distribution of dark matter particles in our galactic neighbourhood. In this paper, we make a systematic study of the impact of astrophysical uncertainties on electron recoil events at the direct detection experiments with Xenon and semiconductor detectors. We find that within the standard halo model there can be up to $\sim 50\%$ deviation from the fiducial choice in the exclusion bounds from these observational uncertainties. For non-standard halo models, we report a similar deviation from the fiducial standard halo model when fitted with recent cosmological $N$-body simulations while even larger deviations are obtained in case of the observational uncertainties.

27 pages, 16 figures, 3 tables, matches the published version

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Cited by in corpus (7)

• EXCEED-DM: Extended Calculation of Electronic Excitations for Direct Detection of Dark Matter
• Impact of galactic distributions in celestial capture of dark matter
• Spin-dependent sub-GeV Inelastic Dark Matter-electron scattering and Migdal effect: (I). Velocity Independent Operator
• Solar constraints on captured electrophilic dark matter
• Dark matter substructures affect dark matter-electron scattering in xenon-based direct detection experiments
• Detection of Inelastic Dark Matter via Electron Recoils in SENSEI
• Halo-Independent Analysis of Direct Dark Matter Detection Through Electron Scattering