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Primordial non-Gaussianities from multiple-field inflation

journal contribution
posted on 2023-06-08, 07:17 authored by David SeeryDavid Seery, James E Lidsey
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 delta N 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 use of our formalism, we calculate the primordial non-Gaussianity arising in a model of assisted inflation.

History

Publication status

  • Published

Journal

Journal of Cosmology and Astroparticle Physics

ISSN

1475-7516

Issue

9

Volume

2005

Department affiliated with

  • Physics and Astronomy Publications

Notes

Article Number: 011

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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