Halo-independent comparison of direct detection experiments in the
  effective theory of dark matter-nucleon interactions
  The theoretical interpretation of dark matter direct detection experiments is
hindered by uncertainties of the microphysics governing the dark matter-nucleon
interaction, and of the dark matter density and velocity distribution inside
the Solar System. These uncertainties are especially relevant when confronting
a detection claim to the null results from other experiments, since seemingly
conflicting experimental results may be reconciled when relaxing the
assumptions about the form of the interaction and/or the velocity distribution.
We present in this paper a halo-independent method to calculate the maximum
number of events in a direct detection experiment given a set of null search
results, allowing for the first time the scattering to be mediated by an
arbitrary combination of various interactions (concretely we consider up to
64). We illustrate this method to examine the compatibility of the dark matter
interpretation of the three events detected by the silicon detectors in the
CDMS-II experiment with the null results from XENON1T and PICO-60.
