On Warm Natural Inflation and Planck 2018 constraints
Abstract
We investigate Natural Inflation with non-minimal coupling to gravity, characterized either by a quadratic or a periodic term, within the Warm Inflation paradigm during the slow roll stage, in both strong and weak dissipation limits, and show that, in the case of -linearly dependent dissipative term, it can accommodate the spectral index and tensor-to-scalar ratio observables given by Planck 2018 constraints, albeit with a too small value of the e-folding number to solve the horizon problem, providing thus only a partial solution to Natural Inflation issues. Assuming a -cubically dependent dissipative term can provide a solution to this e-folding number issue.
Keywords
Cite
@article{arxiv.2211.07775,
title = {On Warm Natural Inflation and Planck 2018 constraints},
author = {Mahmoud AlHallak and Khalil Kalid Al Said and Nidal Chamoun and Moustafa Sayem El-Daher},
journal= {arXiv preprint arXiv:2211.07775},
year = {2023}
}
Comments
pdflatex, 18 pages, 4 figures, version to appear in Universe as an invited article for the Special Issue on `Warm Inflation'