Spectral indices in Eddington-inspired Born-Infeld inflation
General Relativity and Quantum Cosmology
2015-09-30 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We investigate the scalar and tensor spectral indices of the quadratic inflation model in Eddington-inspired Born-Infeld (EiBI) gravity. We find that the EiBI corrections to the spectral indices are of second and first order in the slow-roll approximation for the scalar and tensor perturbations respectively. This is very promising since the quadratic inflation model in general relativity provides a very nice fit for the spectral indices. Together with the suppression of the tensor-to-scalar ratio EiBI inflation agrees well with the observational data.
Keywords
Cite
@article{arxiv.1506.07061,
title = {Spectral indices in Eddington-inspired Born-Infeld inflation},
author = {Inyong Cho and Jinn-Ouk Gong},
journal= {arXiv preprint arXiv:1506.07061},
year = {2015}
}
Comments
(v1) 9 pages, 1 figure; (v2) references added, to appear in Physical Review D