Two-Loop Polarization Contributions to Radiative-Recoil Corrections to Hyperfine Splitting in Muonium

Details Two-Loop Polarization Contributions to Radiative-Recoil Corrections to Hyperfine Splitting in Muonium Two-Loop Polarization Contributions to Radiative-Recoil Corrections to Hyperfine Splitting in Muonium

2001-07-23

arxiv.org/abs/hep-ph/0107238v1

Phys.Rev. D65 (2002) 013003

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 11 figures

Scientific paper

10.1103/PhysRevD.65.013003

We calculate radiative-recoil corrections of order $\alpha^2(Z\alpha)(m/M)E_F$ to hyperfine splitting in muonium generated by the diagrams with electron and muon polarization loops. These corrections are enhanced by the large logarithm of the electron-muon mass ratio. The leading logarithm cubed and logarithm squared contributions were obtained a long time ago. The single-logarithmic and nonlogarithmic contributions calculated here improve the theory of hyperfine splitting, and affect the value of the electron-muon mass ratio extracted from the experimental data on the muonium hyperfine splitting.

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