Abstract
Phys. Rev. D 100, 055039 (2019) Measurements from the Gaia satellite have greatly increased our knowledge of
the dark matter velocity distributions in the Solar neighborhood. There is
evidence for multiple cold structures nearby, including a high-velocity stream
counterrotating relative to the Sun. This stream could significantly alter the
spectrum of recoil energies and increase the annual modulation of dark matter
in direct detection experiments such as DAMA/Libra. We reanalyze the
experimental limits from Xenon1T, CDMSlite, PICO-60 and COSINE-100, and compare
them to the results of the DAMA/Libra experiment. While we find that this new
component of the dark matter velocity distribution can greatly improve the fit
to the DAMA/Libra data, both spin-independent and spin-dependent
interpretations of the DAMA/Libra signal with elastic and inelastic scattering
continue to be ruled out by the null results of other experiments, in
particular Xenon1T.