English

How to Produce an Arbitrarily Small Tensor to Scalar Ratio

Cosmology and Nongalactic Astrophysics 2019-06-13 v2 General Relativity and Quantum Cosmology

Abstract

We construct a toy a model which demonstrates that large field single scalar inflation can produce an arbitrarily small scalar to tensor ratio in the window of e-foldings recoverable from CMB experiments. This is done by generalizing the α\alpha-attractor models to allow the potential to approach a constant as rapidly as we desire for super-planckian field values. This implies that a non-detection of r alone can never rule out entirely the theory of large field inflation.

Keywords

Cite

@article{arxiv.1703.07225,
  title  = {How to Produce an Arbitrarily Small Tensor to Scalar Ratio},
  author = {Daniel J. Brooker},
  journal= {arXiv preprint arXiv:1703.07225},
  year   = {2019}
}