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: |
05 Dec 2022 15:39 |
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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