Brane inflation and Trans-Planckian censorship conjecture

TL;DR

This paper examines how the trans-Planckian censorship conjecture constrains brane inflation models, imposing bounds on key parameters and linking brane tension to the five-dimensional Planck mass.

Contribution

It provides new bounds on brane inflation parameters based on the conjecture, highlighting the role of brane tension and its relation to the five-dimensional Planck mass.

Findings

Stronger constraints than standard inflation models.

Bound on brane tension and five-dimensional Planck mass.

Constraints depend on model parameters.

Abstract

The constraint of trans-Planckian censorship conjecture on brane inflation model is considered. The conjectures put an upper bound on the main parameter including temperature, inflation time, potential, and the tensor-to-scalar ratio parameter $r$. It is determined that the resulting constraint could be more stronger than what we have for the standard inflationary models. The constraint in general depends on the brane tension and it is concluded that the conjecture also confined the value of brane tension in order to have consistency for the model. Confining the brane tension turns into a determining value for the five-dimensional Planck mass.