Inflation from an E-Model Potential of $$\alpha $$-Attractors

Abstract

In this paper, we study the $$\alpha $$ -attractors in the framework of the Randall–Sundrum type II braneworld model. We consider the simplest E-model of $$\alpha $$ -attractors and apply the slow-roll approximation in high energy limit. In this scenario, we numerically investigate the inflationary parameters and show that high-energy brane corrections have significant effect on the parameter $$\alpha $$ ; namely, lower values of $$\alpha $$ are observationally preferred in this limit. The latter substantially reduces the tensor-to-scalar ratio of perturbations making the braneworld inflation compatible with observational data.