Quartic inflation and radiative corrections with non-minimal coupling

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Published 8 October 2019 • © 2019 IOP Publishing Ltd and Sissa Medialab
, , Citation Nilay Bostan and Vedat Nefer Şenoğuz JCAP10(2019)028 DOI 10.1088/1475-7516/2019/10/028

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1 Department of Physics, Mimar Sinan Fine Arts University, Silah\csör Cad. No. 89, İstanbul 34380, Turkey

2 Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242, U.S.A.

Dates

  1. Received 22 July 2019
  2. Accepted 19 September 2019
  3. Published

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1475-7516/2019/10/028

Abstract

It is well known that the non-minimal coupling ξ ϕ2 R between the inflaton and the Ricci scalar affects predictions of single field inflation models. In particular, the λ ϕ4 quartic inflation potential with ξ≳0.005 is one of the simplest models that agree with the current data. After reviewing the inflationary predictions of this potential, we analyze the effects of the radiative corrections due to couplings of the inflaton to other scalar fields or fermions. Using two different prescriptions discussed in the literature, we calculate the range of these coupling parameter values for which the spectral index ns and the tensor-to-scalar ratio r are in agreement with the data taken by the Keck Array/BICEP2 and Planck collaborations.

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This article was updated on 11 October 2019 to correct the last author name

10.1088/1475-7516/2019/10/028