1207.1021 (Michael I. Eides et al.)

Three-Loop Contribution to Hyperfine Splitting in Muonium: Polarization
Corrections to Light by Light Scattering Blob    [PDF]

Michael I. Eides, Valery A. Shelyuto

We calculate corrections of order $\alpha^3(Z\alpha)E_F$ to hyperfine splitting in muonium generated by the gauge invariant set of diagrams with polarization insertions in the light by light scattering diagrams. This nonrecoil contribution turns out to be -2.63 Hz. The total contribution of all known corrections of order $\alpha^3(Z\alpha)E_F$ is equal to -4.28 Hz.

View original: http://arxiv.org/abs/1207.1021