TY  - JOUR
AU  - Motohashi, H.
AU  - Starobinsky, A. A.
PY  - 2017
DA  - 2017//
TI  - f (R) constant-roll inflation
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 538
EP  - 8pp
VL  - 77
IS  - 8
PB  - Springer
AB  - 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.
SN  - 1434-6044
UR  - http://arxiv.org/abs/1704.08188
UR  - https://doi.org/10.1140/epjc/s10052-017-5109-x
DO  - 10.1140/epjc/s10052-017-5109-x
LA  - English
N1  - WOS:000407635000002
ID  - Motohashi+Starobinsky2017
ER  -