  The smallness of the baryon asymmetry in our universe is one of the greatest
mysteries and may originate from some profound physics beyond the standard
model. We investigate the Affleck-Dine baryogenesis in split supersymmetry, and
find that the smallness of the baryon asymmetry is directly related to the
hierarchy between the supersymmetry breaking squark/slepton masses and the weak
scale. Put simply, the baryon asymmetry is small because of the split mass
spectrum.
