Tensor-to-scalar ratio in Eddington-inspired Born–Infeld inflation
Abstract
We investigate the scalar perturbation of the inflation model driven by a massive scalar field in Eddington-inspired Born–Infeld gravity. We focus on the perturbation at the attractor stage in which the first and the second slow-roll conditions are satisfied. The scalar perturbation exhibits the corrections to the chaotic inflation model in general relativity. We find that the tensor-to-scalar ratio becomes smaller than that of the usual chaotic inflation.
- Publication:
-
European Physical Journal C
- Pub Date:
- November 2014
- DOI:
- 10.1140/epjc/s10052-014-3155-1
- arXiv:
- arXiv:1408.2652
- Bibcode:
- 2014EPJC...74.3155C
- Keywords:
-
- Scalar Perturbation;
- Perturbation Field;
- Tensor Perturbation;
- Massive Scalar Field;
- Attractor Stage;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Theory
- E-Print:
- 9 pages. revised version to appear in EPJC, with minor typo corrections. arXiv admin note: text overlap with arXiv:1404.6081