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New Corrections of Order $α^6$ to $s$-Levels of Two-Body Systems

Michael I. Eides·Howard Grotch
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Abstract

New corrections to the energy of $S$-levels of positronium of order $mα^6$ which are as large as several hundred kilohertz are obtained. A new recoil correction of order $α(Zα)^5(m/M)m$ to the Lamb shift in hydrogen is calculated. This correction turns out to be too small from the phenomenological point of view.

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Michael I. Eides, Howard Grotch. 1994-12-13. New Corrections of Order $α^6$ to $s$-Levels of Two-Body Systems. https://doi.org/10.1103/physreva.52.1757

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