Three-Loop Corrections to Lamb Shift in Muonium and Positronium

Abstract

We calculate hard spin-independent three-loop radiative corrections to energy levels in muonium and positronium which are due to radiative insertions in two-photon exchange diagrams. These corrections could be relevant for the new generation of precise $1S-2S$ and $2S-2P$ measurements in muonium and positronium.

arXiv comment14 pages, 6 figures; v.2: Title and abstract changed, new results included, list of references amended

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Cited by in corpus (3)

• Update of Muonium 1S-2S transition frequency
• Muonium Lamb shift: theory update and experimental prospects
• Three-Loop Corrections to Lamb Shift in Positronium: Electron Factor and Polarization