Sequestering the Gravitino: Neutralino Dark Matter in Gauge Mediation

TL;DR

This paper explores how conformal sequestering in gauge-mediated supersymmetry models can produce neutralino dark matter, addressing issues like flavor and mu/B mu problems by altering the gravitino mass hierarchy.

Contribution

It introduces a mechanism where conformal dynamics in gauge mediation can yield neutralino dark matter and resolve key supersymmetry challenges.

Findings

Conformal sequestering can increase gravitino mass relative to other superpartners.

Neutralino can be the lightest supersymmetric particle in these models.

The approach addresses flavor and mu/B mu problems effectively.

Abstract

In conventional models of gauge-mediated supersymmetry breaking, the lightest supersymmetric particle (LSP) is invariably the gravitino. However, if the supersymmetry breaking sector is strongly coupled, conformal sequestering may raise the mass of the gravitino relative to the remaining soft supersymmetry-breaking masses. In this letter, we demonstrate that such conformal dynamics in gauge-mediated theories may give rise to satisfactory neutralino dark matter while simultaneously solving the flavor and mu/ B mu problems.