The simplest extension of Starobinsky inflation
High Energy Physics - Theory
2015-10-21 v1 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We consider the simplest extension to the Starobinsky model, by allowing an extra scalar field to help drive inflation. We perform our analysis in the Einstein frame and calculate the power spectra at the end of inflation to second order in the slow--roll parameters. We find that the model gives predictions in great agreement with the current Planck data without the need for fine-tuning. Our results encourage current efforts to embed the model in a supergravity setting.
Keywords
Cite
@article{arxiv.1505.01727,
title = {The simplest extension of Starobinsky inflation},
author = {Carsten van de Bruck and Laura Elena Paduraru},
journal= {arXiv preprint arXiv:1505.01727},
year = {2015}
}
Comments
8 pages, 3 figures, revtex style