On the muon anomalous magnetic moment in models with a superlight gravitino

TL;DR

This paper analyzes how models with a superlight gravitino affect the muon anomalous magnetic moment, highlighting the potential for upcoming experiments to explore new parameter space regions beyond current collider constraints.

Contribution

It provides a comprehensive analysis of gravitino contributions to the muon g-2 and discusses the phenomenological implications and experimental prospects.

Findings

Current constraints are comparable to collider limits.

Upcoming experiments can probe new parameter regions.

Results are relevant for interpreting muon g-2 anomalies.

Abstract

We perform a general analysis of the contributions to the muon anomalous magnetic moment in models with a superlight gravitino. We discuss the interpretation and the phenomenological implications of the results. We find that present constraints on the model parameters are comparable and complementary to the ones coming from collider searches and from perturbative unitarity. However, the Brookhaven E821 experiment will probe large unexplored regions of parameter space.