Ruling out an inflation driven by a power law potential: kinetic coupling does not help
General Relativity and Quantum Cosmology
2022-12-07 v3
Abstract
We demonstrate that the latest constraints on inflationary observables, namely the tensor-to-scalar ratio and the scalar spectral index , from the Cosmic Background Radiation (CMB) observations are already strong enough to rule out the model of a scalar field with a power law potential even in the presence of kinetic coupling to gravity with a positive coupling constant. The case for a negative coupling constant needs special treatment.
Keywords
Cite
@article{arxiv.2203.14599,
title = {Ruling out an inflation driven by a power law potential: kinetic coupling does not help},
author = {N. Avdeev and A. Toporensky},
journal= {arXiv preprint arXiv:2203.14599},
year = {2022}
}
Comments
4 pages with 1 eps figure; title and abstract have been changed to better match with the result obtained; to appear in Gravitation and Cosmology