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Nonminimal Coleman-Weinberg inflation with an R ^2^ term by Alexandros Karam; Thomas Pappas; Kyriakos Tamvakis is a Physics and Astronomy article available to read on EtoBox.

What is Nonminimal Coleman-Weinberg inflation with an R ^2^ term about?

We extend the Coleman-Weinberg inflationary model where a scalar field φ is non-minimally coupled to gravity with the addition of the R 2 term. We express the theory in terms of two scalar fields and going to the Einstein frame we employ the Gildener-Weinberg formalism, compute the one-loop effective potential and essentially reduce the problem to the case of single-field inflation. It turns out that there is only one free parameter, namely, the mixing angle between the scalars. For a wide range of this angle, we compute the inflationary observables which are in agreement with the latest experimental bounds. The effect of the R 2 term is that it lowers the value of the tensor-to-scalar ratio r.

Who reads Nonminimal Coleman-Weinberg inflation with an R ^2^ term?

Author

Alexandros Karam; Thomas Pappas; Kyriakos Tamvakis

Publisher

IOP Publishing; Institute of Physics (ISSN 1475-7508)

Published

2019

Language

EN

Field

Physics and Astronomy (Physical Sciences)