Exclusion of Leptophilic Dark Matter Models using XENON100 Electronic
  Recoil Data
  Laboratory experiments searching for galactic dark matter particles
scattering off nuclei have so far not been able to establish a discovery. We
use data from the XENON100 experiment to search for dark matter interacting
with electrons. With no evidence for a signal above the low background of our
experiment, we exclude a variety of representative dark matter models that
would induce electronic recoils. For axial-vector couplings to electrons, we
exclude cross-sections above 6x10^(-35) cm^2 for particle masses of m_chi = 2
GeV/c^2. Independent of the dark matter halo, we exclude leptophilic models as
explanation for the long-standing DAMA/LIBRA signal, such as couplings to
electrons through axial-vector interactions at a 4.4 sigma confidence level,
mirror dark matter at 3.6 sigma, and luminous dark matter at 4.6 sigma.
