Anomaly Mediated Supersymmetry Breaking in Four Dimensions, Naturally

TL;DR

This paper introduces a four-dimensional model where anomaly mediated supersymmetry breaking naturally occurs, leveraging a strongly-coupled infrared fixed point to sequester hidden and visible sectors, providing a natural hierarchy and addressing flavor issues.

Contribution

The model demonstrates a natural, parameter-free mechanism for anomaly mediation in four dimensions using strong renormalization effects near an infrared fixed point.

Findings

Supersymmetry breaking is dynamically generated without small parameters.

Flavor-changing neutral currents are naturally suppressed.

The hierarchy between the supersymmetry-breaking and Planck scales is explained naturally.

Abstract

We present a simple four-dimensional model in which anomaly mediated supersymmetry breaking naturally dominates. The central ingredient is that the hidden sector is near a strongly-coupled infrared fixed-point for several decades of energy below the Planck scale. Strong renormalization effects then sequester the hidden sector from the visible sector. Supersymmetry is broken dynamically and requires no small input parameters. The model provides a natural and economical explanation of the hierarchy between the supersymmetry-breaking scale and the Planck scale, while allowing anomaly mediation to address the phenomenological challenges posed by weak scale supersymmetry. In particular, flavor-changing neutral currents are naturally near their experimental limits.