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arXiv · 2303.05260

Non-Gaussianity in the warm k-inflation

Chao-Qun Shen·Xiao-Min Zhang·Zhi-Peng Peng·He Liu·Xi-Bin Li·Peng-Cheng Chu
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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.

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Chao-Qun Shen, Xiao-Min Zhang, Zhi-Peng Peng, He Liu, Xi-Bin Li, Peng-Cheng Chu. 2023-03-09. Non-Gaussianity in the warm k-inflation. https://doi.org/10.1103/physrevd.107.123521

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