Bound State Effect on the Electron g-2

Abstract

We evaluate a non-perturbative QED contribution to the electron g-2 which comes from virtual positronium. We find it to be 9.0*10^{-14}. This value is comparable to the five-loop contribution of usual perturbative calculation, and several times larger than the electroweak correction.

4 pages, 5 figures, 1 table