Hypercharged Dark Matter and Direct Detection as a Probe of Reheating
  The lack of new physics at the LHC so far weakens the argument for TeV scale
thermal dark matter. On the other hand, heavier, non-thermal dark matter is
generally difficult to test experimentally. Here we consider the interesting
and generic case of hypercharged dark matter, which can allow for heavy dark
matter masses without spoiling testability. Planned direct detection
experiments will be able to see a signal for masses up to an incredible
$10^{10}$ GeV, and this can further serve to probe the reheating temperature up
to about $10^9$ GeV, as determined by the non-thermal dark matter relic
abundance. The $Z$-mediated nature of the dark matter scattering may be
determined in principle by comparing scattering rates on different detector
nuclei, which in turn can reveal the dark matter mass. We will discuss the
extent to which future experiments may be able to make such a determination.
