Superfield description of 5D supergravity on general warped geometry

TL;DR

This paper develops a systematic superfield-based method to derive 5D supergravity actions on warped geometries, including non-BPS backgrounds, clarifying radion superfield and SUSY breaking effects.

Contribution

It introduces a practical superfield formalism for 5D supergravity on warped geometries, including non-BPS backgrounds, and clarifies the radion superfield and SUSY breaking mechanisms.

Findings

Superfield formalism simplifies 5D supergravity derivation.

Identification of radion superfield in superconformal gravity.

Analysis of SUSY breaking effects from geometry backreaction.

Abstract

We provide a systematic and practical method of deriving 5D supergravity action described by 4D superfields on a general warped geometry, including a non-BPS background. Our method is based on the superconformal formulation of 5D supergravity, but is easy to handle thanks to the superfield formalism. We identify the radion superfield in the language of 5D superconformal gravity, and clarify its appearance in the action. We also discuss SUSY breaking effects induced by a deformed geometry due to the backreaction of the radius stabilizer.