Primordial non-Gaussianity in noncanonical warm inflation with nonminimal derivative coupling
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.
Keywords
Cite
@article{arxiv.2511.16312,
title = {Primordial non-Gaussianity in noncanonical warm inflation with nonminimal derivative coupling},
author = {Xiao-Min Zhang and Run-Qing Zhao and Yun-Cai Feng and Peng-Cheng Chu and Zhi-Peng Peng and Xi-Bin Li},
journal= {arXiv preprint arXiv:2511.16312},
year = {2025}
}