Inflation with sterile scalar coupled to massive fermions and to gravity
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.
- Publication:
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arXiv e-prints
- Pub Date:
- October 2020
- DOI:
- 10.48550/arXiv.2010.14639
- arXiv:
- arXiv:2010.14639
- Bibcode:
- 2020arXiv201014639M
- Keywords:
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- High Energy Physics - Theory
- E-Print:
- Fits the version accepted in Gravitation and Cosmology