https://doi.org/10.1140/epjc/s10052-020-8357-0
Regular Article - Theoretical Physics
Inflation with a class of concave inflaton potentials in Randall–Sundrum model
1
Department of Theoretical Physics, University of Science, Ho Chi Minh City, 700000, Vietnam
2
Vietnam National University, Ho Chi Minh City, 700000, Vietnam
* e-mail: locngo148@gmail.com
Received:
25
June
2020
Accepted:
14
August
2020
Published online:
25
August
2020
We investigate inflation with a class of concave inflaton potentials of the form 
in the Randall–Sundrum model with an infinite extra spatial dimension. We show that this class of models is much more in good agreement with observations compared to the standard inflation. We also find the range of the five-dimensional Planck scale (
) and show that large tensor-to-scalar ratios do not eliminate small-field inflation in braneworld cosmology.
© The Author(s), 2020
