Eighth-order magnetic moment of the electron. IV. Vertex diagrams containing photon-photon scattering subdiagrams

We have evaluated the contribution to the eighth-order term of the anomalous magnetic moment of the electron arising from a class of 144 vertex diagrams all of which contain a photon- photon scattering subdiagram with various further radiative corrections. Our result is (-0.473 0.015)4. The theoretical error represents the estimated accuracy (90% confidence limit) of the required numerical integration. This result is obtained from approximately 6000 CPU hours of computation on various large-scale (scalar and vector) computers and replaces our earlier preliminary result for this group of diagrams.