Non-Gaussianity in the inflating curvaton
  Inflating curvaton can create curvature perturbation when the curvaton density is slowly varying. Using the delta-N formalism, we discuss the evolution of the curvature perturbation during curvaton inflation and find analytic formulation of the non-Gaussianity parameter. We first consider the inflating curvaton with sufficiently long inflationary expansion. Then we compare the result with short curvaton inflation. 
Seishi Enomoto, Kazunori Kohri and Tomohiro Matsuda
hep-ph astro-ph.CO hep-th