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arXiv · 1712.07071

Post-inflationary Scalar Tensor Cosmology and Inflationary Parameters

Anshuman Maharana·Ivonne Zavala
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Abstract

Scalar fields provide attractive modifications of pre-BBN cosmology, which have interesting implications for dark matter abundances. We analyse the effect of these modifications on the number of e-foldings between horizon exit of CMB modes and the end of inflation $(N_k)$, and examine the consequences for inflationary predictions of various models. We find significant effects in the predictions in the $(n_s, r)$ plane. For a large part of the parameter space, the shift in $N_k$ is positive; this ameliorates the tension of $m^{2} \varphi^{2}$ and natural inflation with data.

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Anshuman Maharana, Ivonne Zavala. 2017-12-19. Post-inflationary Scalar Tensor Cosmology and Inflationary Parameters. https://doi.org/10.1103/physrevd.97.123518

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