Contributions to the Muon's Anomalous Magnetic Moment from a Hidden Sector

TL;DR

This paper investigates how a hidden sector coupled to the muon could explain the observed deviation in its anomalous magnetic moment, providing new theoretical insights into potential physics beyond the standard model.

Contribution

It introduces a novel calculation of the muon's anomalous magnetic moment considering interactions with a hidden sector and a connector particle.

Findings

Quantifies the contribution of hidden sector particles to the muon's magnetic moment.

Provides a framework for testing hidden sector models against muon g-2 measurements.

Suggests possible explanations for the 3.1σ deviation from the standard model.

Abstract

The measurement of the anomalous magnetic moment of the muon provides a stringent test of the standard model and of any physics that lies beyond it. There is currently a deviation of $3.1\sigma$ between the standard model prediction for the muon's anomalous magnetic moment and its experimental value. We calculate the contribution to the anomalous magnetic moment in theories where the muon couples to a particle in a hidden sector (that is, uncharged under the standard model) and a connector (which has nontrivial standard model gauge and hidden sector quantum numbers).