f (R) constant-roll inflation

被引：92

作者：

Motohashi, Hayato ^{[1
]}

Starobinsky, Alexei A. ^{[2
,3
]}

机构：

[1] Univ Valencia, CSIC, Inst Fis Corpuscular IFIC, Valencia 46980, Spain

[2] RAS, LD Landau Inst Theoret Phys, Moscow 119334, Russia

[3] Natl Res Univ, Higher Sch Econ, Moscow 101000, Russia

来源：

EUROPEAN PHYSICAL JOURNAL C | 2017年 / 77卷 / 08期

关键词：

MODELS;

D O I：

10.1140/epjc/s10052-017-5109-x

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

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.

引用

页数：8

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