Dark Matter in Gauge Mediated Supersymmetry Breaking using Metastable Vacua

TL;DR

This paper explores how metastable supersymmetry breaking vacua in gauge mediation models can naturally produce gravitino dark matter through early universe dynamics and coherent oscillations of the supersymmetry breaking field.

Contribution

It demonstrates that the deviation of the supersymmetry breaking field in the early universe can lead to gravitino production matching observed dark matter levels.

Findings

Coherent oscillations of the supersymmetry breaking field can decay into gravitinos.

Parameter ranges exist where gravitino abundance explains dark matter.

The model links early universe dynamics with dark matter production.

Abstract

We point out that, in a class of gauge mediation models using metastable supersymmetry breaking vacua, the minimum of the supersymmetry breaking field in the early universe is dynamically deviated from the one in the low energy. The deviation induces coherent oscillations of the supersymmetry breaking field, which decays into the gravitinos. For certain parameters, it can produce a right amount of the gravitinos to account for the observed dark matter.