Supersymmetry Breaking and Composite Extra Dimensions

TL;DR

This paper explores how strongly-coupled superconformal hidden sectors in supergravity models can naturally suppress flavor-violating effects, enabling anomaly-mediated supersymmetry breaking to dominate through a novel extra-dimensional interpretation.

Contribution

It introduces explicit models of sequestered hidden sectors using superconformal dynamics, linking strongly-coupled 4D theories with extra-dimensional mechanisms via AdS/CFT.

Findings

Large anomalous dimensions suppress Kahler contact terms.

Sequestering allows anomaly mediation to dominate supersymmetry breaking.

Models based on supersymmetric QCD in the conformal window are constructed.

Abstract

We study supergravity models in four dimensions where the hidden sector is superconformal and strongly-coupled over several decades of energy below the Planck scale, before undergoing spontaneous breakdown of scale invariance and supersymmetry. We show that large anomalous dimensions can suppress Kahler contact terms between the hidden and visible sectors, leading to models in which the hidden sector is "sequestered" and anomaly-mediated supersymmetry breaking can naturally dominate, thus solving the supersymmetric flavor problem. We construct simple, explicit models of the hidden sector based on supersymmetric QCD in the conformal window. The present approach can be usefully interpreted as having an extra dimension responsible for sequestering replaced by the many states of a (spontaneously-broken) strongly-coupled superconformal hidden sector, as dictated by the AdS/CFT correspondence.