Revised value of the eighth-order electron g-2

Understand

The contribution to the eighth-order anomalous magnetic moment (g-2) of the electron from a set of diagrams without closed lepton loops is recalculated using a new FORTRAN code generated by an automatic code generator.

• Comparing the contributions of individual diagrams of old and new calculations, we found an inconsistency in the old treatment of infrared subtraction terms in two diagrams.
• Correcting this error leads to the revised value -1.9144 (35) (alpha/pi)^4 for the eighth-order term.
• This theoretical change induces the shift of the inverse of the fine structure constant by -6.41180(73)x10^{-7}.