Photon-Photon Scattering Contribution to the Sixth-Order Magnetic Moment of the Muon

Abstract
We report a calculation of the three-photon-exchange (electron-loop) contribution to the sixth-order anomalous magnetic moment of the muon. Our result, which contains a logarithmic dependence on the muon-to-electron mass ratio, brings the theoretical prediction into agreement with the CERN measurements, within the 1-standard-deviation experimental accuracy.