Muon (g-2) in models with a very light gravitino

TL;DR

This paper analyzes how models with a very light gravitino affect the muon g-2 anomaly, providing constraints on model parameters that complement collider search results and will be refined by upcoming experiments.

Contribution

It offers a general analysis of supersymmetry-breaking effects on muon g-2 in models with a superlight gravitino, highlighting new parameter constraints.

Findings

Constraints on model parameters are comparable to collider bounds.

Results are complementary to collider search results.

Constraints will become more stringent after Brookhaven E821 experiment.

Abstract

We present the results of a general analysis of the contributions of the supersymmetry-breaking sector to the muon anomalous magnetic moment in models with a superlight gravitino. We find constraints on the model parameters that are comparable and complementary to the ones coming from collider searches, and will become more stringent after the Brookhaven E821 experiment.