Primordial non-Gaussianity in noncanonical warm inflation with nonminimal derivative coupling

TL;DR

This paper analyzes non-Gaussian perturbations in warm k-inflation driven by kinetic energy, focusing on three- and four-point correlations, and compares theoretical predictions with observational data to constrain model parameters.

Contribution

It provides a detailed computation of intrinsic and b4N non-Gaussianities in warm k-inflation and compares these with observations, offering new insights into inflationary models.

Findings

Computed intrinsic non-Gaussianity parameter f_{NL}^{int}

Analyzed b4N non-Gaussianity component f_{NL}^{b4N}

Compared theoretical non-Gaussian predictions with observational data

Abstract

This paper presents and investigates non-Gaussian perturbations for the warm k-inflation model that is driven by pure kinetic energy. The two complementary components of the overall non-Gaussianity are the three-point and four-point correlations. The intrinsic non-Gaussian component, denoted as the nonlinear parameter f_{NL}^{int}, is rooted in the three-point correlation for the inflaton field. Meanwhile, the \delta N part non-Gaussianity, denoted as f_{NL}^{\delta N}, is the contribution attributed to the four-point correlation function of the inflaton field. In this paper, the above two components in warm k-inflation are individually computed and analyzed. Then, comparisons and discussions between them are conducted, and the non-Gaussian theoretical results are compared with experimental observations to determine the range of model parameters within the allowable range of observation.