Dark Matter, Dark Forces, and the LHC

Many models impose a discrete symmetry to forbid decays of the dark matter candidate. However, taking the Standard Model as a guide, Dark Matter may be expected to be stable due to gauge, Lorentz, or accidental symmetries. I examine the possibility that dark matter may be the manifestation of dark forces of a hidden sector, i.e. "Dark Force = Dark Matter." As an illustrative and minimal example I consider the hidden SU(2)xU(1) gauge group, with the U(1) kinetically mixed with Standard Model hypercharge. I also study the LHC phenomenology of light vector bosons in Higgs physics.