Primordial non-Gaussianities from multiple-field inflation

@article{Seery2005PrimordialNF,
  title={Primordial non-Gaussianities from multiple-field inflation},
  author={David Seery and James E. Lidsey},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2005},
  volume={2005},
  pages={011 - 011}
}
  • D. Seery, J. Lidsey
  • Published 2 June 2005
  • Physics
  • Journal of Cosmology and Astroparticle Physics
We calculate the three-point correlation function evaluated at horizon crossing for a set of interacting scalar fields coupled to gravity during inflation. This provides the initial condition for the three-point function of the curvature perturbation in the Sasaki–Stewart δN formulation. We find that the effect is small, of the order of a slow-roll parameter, and that the non-Gaussianity can be determined on large scales once the unperturbed background evolution is known. As an example of the… 
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We calculate the three-point correlation function evaluated at horizon crossing for a set of interacting scalar fields coupled to gravity during inflation. This provides the initial condition for the…
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