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Cited by 304Cosmology and Gravitation TheoriesNoncommutative and Quantum Gravity TheoriesBlack Holes and Theoretical Physics

Primordial non-Gaussianities from multiple-field inflation

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Seery, David, Lidsey, James E·2005·Journal of Cosmology and Astroparticle Physics
DOI 10.1088/1475-7516/2005/09/011
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Abstract

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 δ 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.

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  • The first term -6/5 f(3)_NL is too small to be observable in CMB experiments.

    “which is certainly too small to be observable in CMB experiments.Also see [39].”

    From Spectral running and non-Gaussianity from slow-roll inflation in generalized two-field models (2007) · cites this paper as [39]

    Section 2.3 (p. 10) identifies the first term as the momentum-dependent contribution, and the Conclusions (p. 21) say non-Gaussianity arising from microphysics is typically small when fluctuations are close to scale-invariance. The paper does not establish that this term is too small to be observable in CMB experiments; it also says the term can be important when the superhorizon contribution is absent. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

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Authors
Seery, D., & Lidsey, J. E.
Affiliations
Queen Mary University of London (GB)
ORCID
Seery, David
Venue
Journal of Cosmology and Astroparticle Physics
Publisher
IOP Publishing
Published
2005-09-19
Volume
2005
Issue
09
Pages
011-011
ISSN
  • 1475-7508 (ISSN-L)
  • 1475-7516
DOI
10.1088/1475-7516/2005/09/011
OpenAlex
W1974215201
Cited by
304
References
5
Citations by year
2026: 3 · 2025: 5 · 2024: 6 · 2023: 5 · 2022: 7 · 2021: 9 · 2020: 6 · 2019: 5 · 2018: 15 · 2017: 8 · 2016: 11 · 2015: 12 · 2014: 9 · 2013: 17 · 2012: 20
FWCI
15.89
Type
journal article
Language
en
Open access
Locations
  • Journal of Cosmology and Astroparticle Physics (publishedVersion)
  • arXiv (Cornell University) (acceptedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Noncommutative and Quantum Gravity Theories
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Black Holes and Theoretical Physics
Keywords
primordial non-Gaussianity, multi-field inflation, three-point correlation function, horizon crossing, curvature perturbations, interacting scalar fields, slow-roll parameters, assisted inflation, initial conditions

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