Stabilization and radion in de Sitter brane-world

TL;DR

This paper explores the stabilization of de Sitter brane-world models using scalar fields, addressing the hierarchy problem and discussing the complex interpretation of the radion in this context.

Contribution

It introduces a scalar field bulk-brane theory that stabilizes the de Sitter brane-world and discusses potential implications for the radion's interpretation.

Findings

A non-trivial minimum of the modulus potential is achieved.

The hierarchy problem can be addressed within this framework.

The radion's interpretation differs from AdS brane-world scenarios.

Abstract

We consider the stabilization of de Sitter brane-world. The scalar field bulk-brane theory produces the non-trivial minimum of modulus potential where temporal radion is realized. The hierarchy problem (between Planck and electroweak scales) may be solved. However, the interpretation of radion is not so clear as in AdS brane-world. In particulary, the introduction of two times physics or pair-creation of bulk spaces or identification of one of spatial coordinates with imaginary time (non-zero temperature) may be required.