Theory of Muon g-2

TL;DR

This paper reviews the current theoretical and experimental status of the muon g-2 anomaly, highlighting the discrepancy that may indicate new physics beyond the Standard Model.

Contribution

It provides an updated overview of the theoretical calculations, dominant uncertainties, and comparison with experimental results for the muon g-2.

Findings

Significant discrepancy between measured and predicted muon g-2 values.

Dominant uncertainties identified in theoretical contributions.

Potential indication of new physics beyond the Standard Model.

Abstract

The longstanding discrepancy between the measured and the predicted values of the anomalous magnetic moment of the muon, $a_\mu = (g-2)/2$, is one of the most intriguing potential hints of new physics in particle physics. After a brief introduction, the status of the theoretical prediction of g-2 is presented, with some focus on the contributions yielding the dominant uncertainties. The status of the comparison with the experimental measurement is then discussed.