Direct detection of non-galactic light dark matter

A fraction of the dark matter in the solar neighborhood might be composed of non-galactic particles with speeds larger than the escape velocity of the Milky Way. The non-galactic dark matter flux would enhance the sensitivity of direct detection experiments, due to the larger momentum transfer to the target. In this note, we calculate the impact of the dark matter flux from the Local Group and the Virgo Supercluster diffuse components in nuclear and electron recoil experiments. The enhancement in the signal rate can be very significant, especially for experiments searching for dark matter induced electron recoils. (C) 2021 The Author(s). Published by Elsevier B.V.

Automated summary

This study investigates the impact of non-galactic dark matter on direct detection experiments by calculating the effect of dark matter flux from the Local Group and the Virgo Supercluster on nuclear and electron recoil experiments. The results show that the increase in dark matter flux can significantly enhance the signal rate.