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arXiv · 1507.07250

High-Scale Inflation and the Tensor Tilt

Daniel Baumann·Hayden Lee·Guilherme L. Pimentel
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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.

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Daniel Baumann, Hayden Lee, Guilherme L. Pimentel. 2015-07-26. High-Scale Inflation and the Tensor Tilt. https://doi.org/10.1007/jhep01(2016)101

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