Modulus D-term Inflation
  We propose a new model of single-field D-term inflation in supergravity,
where the inflation is driven by a single modulus field which transforms
non-linearly under the U(1) gauge symmetry. One of the notable features of our
modulus D-term inflation scenario is that the global U(1) remains unbroken in
the vacuum and hence our model is not plagued by the cosmic string problem
which can exclude most of the conventional D-term inflation models proposed so
far due to the CMB observations.
