Higgs Inflation, Quantum Smearing and the Tensor to Scalar Ratio

Abstract

In cosmic inflation driven by a scalar gauge singlet field with a tree level Higgs potential, the scalar to tensor ratio r is estimated to be larger than 0.036, provided the scalar spectral index n_s >= 0.96. We discuss quantum smearing of these predictions arising from the inflaton couplings to other particles such as GUT scalars, and show that these corrections can significantly decrease r. However, for n_s >= 0.96, we obtain r >= 0.02 which can be tested by the Planck satellite.

arXiv comment10 pages, 3 figures and 3 tables

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• The Observational Status of Simple Inflationary Models: an Update
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