A Bound Concerning Primordial Non-Gaussianity

Abstract

Seery and Lidsey have calculated the three-point correlator of the light scalar fields, a few Hubble times after horizon exit during inflation. Lyth and Rodriguez have calculated the contribution of this correlator to the three-point correlator of the primordial curvature perturbation. We calculate an upper bound on that contribution, showing that it is too small ever to be observable.

5 pages, typos corrected, added references for section 1

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Cited by in corpus (41)

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• Generating the curvature perturbation at the end of inflation
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• Conditions for large non-Gaussianity in two-field slow-roll inflation
• One-loop corrections to a scalar field during inflation
• Nongaussian and nonscale-invariant perturbations from tachyonic preheating in hybrid inflation
• Non-gaussianity from the inflationary trispectrum
• Nongaussianity from Tachyonic Preheating in Hybrid Inflation
• Evolution of fNL to the adiabatic limit
• On the Issue of the ζSeries Convergence and Loop Corrections in the Generation of Observable Primordial Non-Gaussianity in Slow-Roll Inflation. Part I: the Bispectrum
• Non-gaussianity and cosmic uncertainty in curvaton-type models
• Very Large Primordial Non-Gaussianity from multi-field: Application to Massless Preheating
• The CMB asymmetry from inflation
• Diagrammatic approach to non-Gaussianity from inflation
• Non-gaussianity of inflationary field perturbations from the field equation
• The inflationary bispectrum with curved field-space
• Preheating and the non-gaussianity of the curvature perturbation
• Non-Gaussian Inflationary Perturbations from the dS/CFT Correspondence
• Inflationary perturbation theory is geometrical optics in phase space
• Non-gaussianity in axion Nflation models
• Classicality of the primordial perturbations
• Moment transport equations for the primordial curvature perturbation
• Non-gaussianity for a Two Component Hybrid Model of Inflation
• Higher order contributions to the primordial non-gaussianity
• Transport equations for the inflationary trispectrum
• Non-Gaussian corrections to the probability distribution of the curvature perturbation from inflation
• The squeezed limit of the bispectrum in multi-field inflation
• General formula for the running of local fNL
• Non-gaussianity in axion N-flation models: detailed predictions and mass spectra
• Multi-field effects in a simple extension of $R^2$ inflation
• The hemispherical asymmetry from a scale-dependent inflationary bispectrum
• Scale-dependent bias from multiple-field inflation
• Primordial non-Gaussianity in noncanonical warm inflation
• Primordial non-Gaussianity in warm inflation using $\delta N$ formalism
• Observational Constraints on Two-field Warm Inflation
• Generically large nongaussianity in small multifield inflation
• Non-Gaussianity in a general kind noncanonical warm inflation
• Primordial non-Gaussianity in noncanonical warm inflation: three- and four-point correlations
• Slow-roll corrections in multi-field inflation: a separate universes approach
• Primordial non-Gaussianity in noncanonical warm inflation with nonminimal derivative coupling
• First constraints on the intrinsic CMB dipole and our velocity with Doppler and aberration