Closing the Window on Strongly Interacting Dark Matter
  Constraints are placed on the spin-independent interaction cross section of
dark matter with regular matter by refining two methods. First, dark
matter--cosmic ray interactions are considered, wherein cosmic ray protons
collide with dark matter to contribute to the gamma ray sky. This constraint is
developed using the NFW and Moore dark matter density profiles and new data
from the Fermi gamma ray space telescope. Second, the Earth capture scenario is
considered, wherein particles that are captured self-annihilate at Earth's
center, thus adding to its internal heat flow. The constraint presented here is
developed based on analysis of the drift time of dark matter particles through
Earth, modeled as a core composed of iron and a mantle composed of oxygen with
linear density gradients between layers. An analysis of the cosmic ray
constraint (which rules out dark matter--regular matter interaction cross
sections greater than its value) shows that it overlaps significantly with the
Earth drift time constraint (which rules out cross sections smaller than its
value), closing the window on strongly interacting dark matter particles up to
a mass of about 10^{17} GeV when combined with other exclusions.
