UV Corrections in Sgoldstino-less Inflation
  We study the embedding of inflation with nilpotent multiplets in
supergravity, in particular the decoupling of the sgoldstino scalar field.
Instead of being imposed by hand, the nilpotency constraint on the goldstino
multiplet arises in the low energy-effective theory by integrating out heavy
degrees of freedom. We present explicit supergravity models in which a large
but finite sgoldstino mass arises from Yukawa or gauge interactions. In both
cases the inflaton potential receives two types of corrections. One is from the
backreaction of the sgoldstino, the other from the heavy fields generating its
mass. We show that these scale oppositely with the Volkov-Akulov cut-off scale,
which makes a consistent decoupling of the sgoldstino nontrivial. Still, we
identify a parameter window in which sgoldstino-less inflation can take place,
up to corrections which flatten the inflaton potential.
