  Neutrino coherent scattering cross sections can be as large as 10^{-39} cm^2,
while current dark matter experiments have sensitivities to WIMP coherent
scattering cross sections five orders of magnitude smaller; future experiments
plan to have sensitivities to cross sections as small as 10^{-48} cm^2. With
large target masses and few keV recoil energy detection thresholds, neutral
current coherent scattering of solar neutrinos becomes an irreducible
background in dark matter searches. In the current zero-background analysis
paradigm, neutrino coherent scattering will limit the achievable sensitivity to
dark matter scattering cross sections, at the level of 10^{-46} cm^2.
