Braneworld inflation with effective {\alpha}-attractor potential

TL;DR

This paper explores how high energy corrections in RS braneworlds influence {eta}-attractor inflation, showing that these corrections favor lower {eta} values and allow sub-Planckian field displacements.

Contribution

It demonstrates the impact of brane-world high energy effects on {eta}-attractor inflation, highlighting the preference for lower {eta} and sub-Planckian field values.

Findings

High energy brane corrections significantly affect inflationary parameters.

Lower {eta} values are favored by observational data.

Sub-Planckian field displacements are achievable through brane tension constraints.

Abstract

In this paper, we study inflation with {\alpha}-attractor potential in the RS braneworlds where high energy corrections to the Friedmann equation facilitate slow roll. In this scenario, we numerically investigate the inflationary parameters and show that the high energy brane corrections have significant effect on the parameter {\alpha}, namely, the lower values of the parameter are preferred by observation in this limit. We find that the sub-Planckian values of the field displacement can be achieved by suitably constraining the brane tension.