Constant-roll in the Palatini- R 2 models

Antoniadis, Ignatios; Lykkas, Angelos; Tamvakis, Kyriakos (2020). Constant-roll in the Palatini- R 2 models. Journal of cosmology and astroparticle physics, 2020(04), 033. Institute of Physics Publishing IOP 10.1088/1475-7516/2020/04/033

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We consider models of a scalar field coupled to quadratic R+R2 gravity in the framework of the Palatini formulation. The resulting Einstein-frame generalized k-inflation effective theory is analyzed assuming that the constant-roll condition holds. We focus on a quartic self-interaction potential, a case of particular appeal modelling Higgs inflation, considering the cases of minimal and non-minimal coupling of the inflaton to gravity. For an appropriate range of the model parameters in the large field domain the obtained values for the inflationary observables are found in agreement with current observations.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Antoniadis, Ignatios

Subjects:

500 Science > 530 Physics

ISSN:

1475-7516

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

17 Jun 2020 10:46

Last Modified:

17 Jun 2020 10:46

Publisher DOI:

10.1088/1475-7516/2020/04/033

ArXiv ID:

2002.12681

BORIS DOI:

10.7892/boris.144708

URI:

https://boris.unibe.ch/id/eprint/144708

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