High-Scale Inflation and the Tensor Tilt
High Energy Physics - Theory
2016-02-17 v1 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
In this paper, we explore a novel observational signature of gravitational corrections during slow-roll inflation. We study the coupling of the inflaton field to higher-curvature tensors in models with a minimal breaking of conformal symmetry. In that case, the most general correction to the tensor two-point function is captured by a coupling to the square of the Weyl tensor. We show that these scenarios lead to a correction to the tilt of the tensor power spectrum and hence a violation of the tensor consistency condition. We arrive at the same conclusion through an analysis in conformal perturbation theory.
Cite
@article{arxiv.1507.07250,
title = {High-Scale Inflation and the Tensor Tilt},
author = {Daniel Baumann and Hayden Lee and Guilherme L. Pimentel},
journal= {arXiv preprint arXiv:1507.07250},
year = {2016}
}
Comments
20 pages, 1 figure