Electroweak Vacuum Stabilized by Moduli during/after Inflation
  It is known that the present electroweak vacuum is likely to be metastable
and it may lead to a serious instability during/after inflation. We propose a
simple solution to the problem of vacuum instability during/after inflation. If
there is a moduli field which has Planck-suppressed interactions with the
standard model fields, the Higgs quartic coupling in the early universe
naturally takes a different value from the present one. A slight change of the
quartic coupling in the early universe makes the Higgs potential absolutely
stable and hence we are free from the vacuum instability during/after
inflation.
