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Recoil corrections to the energy levels of hydrogenic atoms

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arxiv 2210.06420 v1 pith:EQJXUYMA submitted 2022-10-12 hep-ph physics.atom-ph

classification hep-phphysics.atom-ph
keywords correctionsalphacalculationhydrogenintegralsorderanalyticapplied
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We have completed the calculation of pure-recoil corrections of order $(Z \alpha)^6$ to Coulombic bound states of two spin-1/2 fermions without approximation in the particle masses. Our result applies to systems of arbitrary mass ratio such as muonium and positronium, and also hydrogen and muonic hydrogen (with the neglect of proton structure effects). We have shown how the two-loop master integrals that occur in the relativistic region can be computed in analytic form, and suggest that the same method can be applied to the three-loop integrals that would be present in a calculation of order $(Z \alpha)^7$ corrections.

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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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