Simultaneous Generation of WIMP Miracle-like Densities of Baryons and
  Dark Matter
  The observed density of dark matter is of the magnitude expected for a
thermal relic weakly-interacting massive particle (WIMP). In addition, the
observed baryon density is within an order of magnitude of the dark matter
density. This suggests that the baryon density is physically related to a
typical thermal relic WIMP dark matter density. We present a model which
simultaneously generates thermal relic WIMP-like densities for both baryons and
dark matter by modifying a large initial baryon asymmetry. Dark matter is due
to O(100) GeV gauge singlet scalars produced in the annihilation of the O(TeV)
coloured scalars which are responsible for the final thermal WIMP-like baryon
asymmetry. The requirement of no baryon washout implies that there are two
gauge singlet scalars. The low temperature transfer of the asymmetry to
conventional baryons can be understood if the long-lived O(TeV) coloured
scalars have large hypercharge, |Y| > 4/3. Production of such scalars at the
LHC would be a clear signature of the model.
