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Second Order in Mass Ratio Radiative-Recoil Corrections to Hyperfine Splitting in Muonium

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arxiv hep-ph/9801384 v2 submitted 1998-01-21 hep-ph physics.atom-ph

classification hep-phphysics.atom-ph
keywords alphacorrectionsfrachyperfineordersplittingmassmuonium
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abstract

Radiative-recoil corrections to hyperfine splitting in muonium of orders $\alpha(Z\alpha)(m/M)^2E_F$ and $(Z^2\alpha)(Z\alpha)(m/M)^2E_F$ are calculated. These corrections are of the second order in the small electron-muon mass ratio. An analytic expression $[(-6 \ln2- \frac{3}{4})\alpha (Z\alpha) - \frac{17}{12} (Z^2 \alpha) (Z\alpha)](\frac{m}{M})^2 E_F$ is obtained. Numerically the correction is equal to $-0.0351\:\mbox{kHz}$ and is of the same order of magnitude as the expected accuracy of the current Los Alamos experiment to measure the hyperfine splitting.

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  1. One more radiative-recoil correction to the Lamb shift in muonium

    physics.atom-ph 2026-07 conditional novelty 7.0 of 10

    The muon-line radiative-recoil correction to the muonium Lamb shift at order α^6(m/M)^2 m is found to be π² times the common prefactor, replacing a previously quoted (139/32−2 ln2) coefficient.

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