Mirror and hidden sector dark matter in the light of new CoGeNT data
  The CoGeNT collaboration has recently made available new data collected over
a period of 15 months. In addition to more accurately measuring the spectrum of
nuclear recoil candidate events they have announced evidence for an annual
modulation signal. We examine the implications of these new results within the
context of mirror/hidden sector dark matter models. We find that the new CoGeNT
data can be explained within this framework with parameter space consistent
with the DAMA annual modulation signal, and the null results of the other
experiments. We also point out that the CoGeNT spectrum at low energies is
observed to obey $dR/dE_R \propto 1/E_R^2$ which suggests that dark matter
interacts via Rutherford scattering rather than the more commonly assumed
contact (four-fermion) interaction.
