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.
