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

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…