At the centers of galaxies, the amount of dark matter is much higher than that of ordinary matter. So the centers can effectively gravitationally attract and accelerate ordinary matter- without much resistance - to much higher speeds than a similar mass of purely ordinary matter would, since ordinary matter interacts very weakly with dark matter. Is this reasoning correct?
If my above reasoning is correct, (and assuming the matter doesn't fall all the way into the super-massive black hole) then can the energy of the particles reach values higher than that in the LHC and other particle accelerators? Can we draw any conclusions about beyond-the-standard-model particle physics by astronomical observations of galactic centers?