A Compelling Vector Curvaton Model and its distinct Observational Signatures.
Wagstaff, Jacques (Lancaster University)

A vector curvaton model with a Maxwell kinetic term and varying kinetic function and mass during inflation is presented. It is shown that, if light until the end of inflation, the vector field can generate statistical anisotropy in the curvature perturbation spectrum and bispectrum, with the latter being predominantly anisotropic. If by the end of inflation the vector field becomes heavy, then particle production is isotropic and the vector curvaton can alone generate the curvature perturbation.