Gravitino Problem in Supergravity Chaotic Inflation and SUSY Breaking
  Scale after BICEP2
  Gravitinos are generically produced by inflaton decays, which place tight
constraints on inflation models as well as supersymmetry breaking scale. We
revisit the gravitino production from decays of the inflaton and the
supersymmetry breaking field, based on a chaotic inflation model suggested by
the recent BICEP2 result. We study cosmological constraints on thermally and
non-thermally produced gravitinos for a wide range of the gravitino mass, and
show that there are only three allowed regions of the gravitino mass:
$m_{3/2}\lesssim 16$eV, $m_{3/2}\simeq 10$--$1000$TeV and $m_{3/2}\gtrsim
10^{13}$GeV.
