http://arxiv.org/abs/2211.07775
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 it can accommodate the spectral index $n_s$ and tensor-to-scalar ratio $r$ 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.
M. AlHallak, K. Said, N. CHAMOUN, et. al.
Wed, 16 Nov 22
5/76
Comments: pdflatex, 12 pages, 3 figures