Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 80, Issue 8, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-020-8357-0
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We investigate inflation with a class of concave inflaton potentials of the form similar to phi(n) (0 < n < 1) in the Randall-Sundrum model with an infinite extra spatial dimension. We show that this class ofmodels ismuch more in good agreement with observations compared to the standard inflation. We also find the range of the five-dimensional Planck scale (M-5) and show that large tensor-to-scalar ratios do not eliminate small-field inflation in braneworld cosmology.
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