The Effective Theory of Self-Interacting Dark Matter
  We present an effective non-relativistic theory of self-interacting dark
matter. We classify the long range interactions and discuss how they can be
generated from quantum field theories. Generic dark sectors can generate
singular potentials. We show how to consistently renormalize such potentials
and apply this to the calculation of the Sommerfeld enhancement of dark matter
interactions. We explore further applications of this enhancement to
astrophysical probes of dark matter including the core vs. cusp problem.
