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arXiv · 2010.14639

Inflation with sterile scalar coupled to massive fermions and to gravity

Jessica S. Martins·Oliver F. Piattella·Ilya L. Shapiro·Alexei A. Starobinsky
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Abstract

In the recent paper [3] it was shown that the consistency of the quantum theory of a sterile scalar coupled to massive fermions requires the inclusion of odd-power terms in the potential of scalar self-interaction. One of the most important examples of a sterile scalar is the inflaton, that is typically a real scalar field which does not belong to representations of particle physics gauge groups, such as $SU(2)$. Here we explore the effects of the odd-power terms in the inflaton potential on main observables, such as the scalar spectral index $n_s$ and the tensor-to-scalar ratio $r$, in the case of a strong, non-minimal coupling of the inflaton to gravity.

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Jessica S. Martins, Oliver F. Piattella, Ilya L. Shapiro, Alexei A. Starobinsky. 2020-10-27. Inflation with sterile scalar coupled to massive fermions and to gravity. https://arxiv.org/abs/2010.14639

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