Brane-induced supersymmetry breaking

TL;DR

This paper investigates how supersymmetry can be spontaneously broken by brane-localized effects in a five-dimensional supergravity model, revealing a nonlocal symmetry breaking mechanism akin to coordinate-dependent Scherk-Schwarz compactification.

Contribution

It introduces a novel model of supersymmetry breaking via brane dynamics in 5D supergravity, with detailed spectrum analysis and interpretation as a coordinate-dependent Scherk-Schwarz mechanism.

Findings

Supersymmetry breaking is spontaneous and nonlocal in the fifth dimension.

The model's spectrum is fully computed, confirming the super-Higgs effect.

The setup can be viewed as a new implementation of Scherk-Schwarz compactification.

Abstract

We study spontaneous supersymmetry breaking induced by brane-localized dynamics in five-dimensional supergravity compactified on S^1/Z_2. We consider a model with gravity in the bulk and matter localized on tensionless branes at the orbifold fixed points. We assume that the brane dynamics give rise to effective brane superpotentials that trigger the supersymmetry breaking. We analyze in detail the super-Higgs effect. We compute the full spectrum and show that the symmetry breaking is spontaneous but nonlocal in the fifth dimension. We demonstrate that the model can be interpreted as a new, non-trivial implementation of a coordinate-dependent Scherk-Schwarz compactification.