Soft Supersymmetry Breaking on the Brane

TL;DR

This paper investigates how supersymmetry breaking occurs in five-dimensional supergravity models with boundary branes, analyzing the resulting soft terms and potential phenomenological implications.

Contribution

It provides a detailed analysis of supersymmetry breaking via boundary superpotentials in 5D supergravity with vector and hypermultiplets, including computation of soft terms and spectrum features.

Findings

Supersymmetry breaking induces potentials for moduli fields.

Soft breaking terms are explicitly computed.

Potential phenomenological implications are discussed.

Abstract

We consider the low energy description of five dimensional models of supergravity with boundaries comprising a vector multiplet and the universal hypermultiplet in the bulk. We analyse the spontaneous breaking of supersymmetry induced by the vacuum expectation value of superpotentials on the boundary branes. When supersymmetry is broken, the moduli corresponding to the radion, the zero mode of the vector multiplet scalar field and the dilaton develop a potential in the effective action. We compute the resulting soft breaking terms and give some indications on the features of the corresponding particle spectrum. We consider some of the possible phenomenological implications when supersymmetry is broken on the hidden brane.