Primordial Black Hole Constraints with Large Extra Dimensions
  We study how the constraints on the primordial black hole density arising
from the extragalactic photon background are modified in the scenario that
there exist extra large spatial dimensions. We find that though the overall
magnitude of the constraints is not substantially different, the mass ranges to
which they apply are, and for some choices of mass it is possible for the black
holes to constitute the entirety of the dark matter.
