The anomalous magnetic moment of the muon: A review of the theoretical contributions

We review the possible contributions to the muon g-factor anomaly, 12(g-2) which are potentially significant for a comparison between theory and experiment at present. This includes purely quantum electrodynamic (QED) perturbation theory effects up to eighth order; hadronic effects at fourth and sixth order; and weak interaction effects. From these sources we get a total theoretical contribution (theory)=(1165 920.612.9)×10-9, to be compared with the latest CERN experimental result (Bailey et al., 1975), (experiment)=116589527) ×10-9. © 1977 American Physical Society.