Collisions of Jets of Particles from Active Galactic Nuclei with   Neutralino Dark Matter
  We examine the possibility that energetic Standard Model particles contained in the jets produced by active galactic nuclei (AGN) may scatter off of the dark matter halo which is expected to surround the AGN. In particular, if there are nearby states in the dark sector which can appear resonantly in the scattering, the cross section can be enhanced and a distinctive edge feature in the energy spectrum may appear. We examine bounds on supersymmetric models which may be obtained from the Fermi Gamma-ray Space Telescope observation of the nearby AGN Centaurus A. 
Jinrui Huang, Arvind Rajaraman and Tim M. P. Tait
hep-ph