Mediation of supersymmetry breaking in extra dimensions

TL;DR

This paper reviews how supersymmetry breaking is mediated through gravitational interactions in models with extra dimensions, focusing on sequestered setups with localized sectors and analyzing quantum effects on soft masses.

Contribution

It provides a comprehensive review of supersymmetry breaking mediation in extra-dimensional models, including quantum effects and various geometric configurations.

Findings

Soft breaking terms are generated radiatively via gravitational effects.

Locality suppresses classical soft terms, making quantum effects dominant.

Different extra-dimensional geometries influence the pattern of soft masses.

Abstract

We review the mechanisms of supersymmetry breaking mediation that occur in sequestered models, where the visible and the hidden sectors are separated by an extra dimension and communicate only via gravitational interactions. By locality, soft breaking terms are forbidden at the classical level and reliably computable within an effective field theory approach at the quantum level. We present a self-contained discussion of these radiative gravitational effects and the resulting pattern of soft masses, and give an overview of realistic model building based on this set-up. We consider both flat and warped extra dimensions, as well as the possibility that there be localized kinetic terms for the gravitational fields.