期刊
EUROPEAN PHYSICAL JOURNAL C
卷 77, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-017-5109-x
关键词
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资金
- MINECO Grant [SEV-2014-0398, II/2014/050]
- Spanish Grant of the MINECO [FPA2014-57816-P]
- European UnionaAZs Horizon research and innovation programme under the Marie Sklodowska-Curie grant [690575, 674896]
- Presidium of the Russian Academy of Sciences
- [RFBR 17-02-01008]
The previously introduced class of two-parametric phenomenological inflationary models in general relativity in which the slow-roll assumption is replaced by the more general, constant-roll condition is generalized to the case of f (R) gravity. A simple constant-roll condition is defined in the original Jordan frame, and exact expressions for a scalaron potential in the Einstein frame, for a function f (R) (in the parametric form) and for inflationary dynamics are obtained. The region of the model parameters permitted by the latest observational constraints on the scalar spectral index and the tensor-to-scalar ratio of primordial metric perturbations generated during inflation is determined.
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