Three-loop corrections to lamb shift in positronium: Electron factor and polarization

Michael I. Eides, Valery A. Shelyuto

Research output: Contribution to journalArticlepeer-review


Hard spin-independent three-loop radiative contributions to energy levels in positronium generated by the two-photon-exchange diagrams with one-loop radiative insertions in the fermion lines and exchanged photons are calculated. This is a next step in calculations of all corrections of order mα7 inspired by the new generation of precise 1S−2S and 2S−2P measurements in positronium.

Original languageEnglish
Article number137247
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - Sep 10 2022

Bibliographical note

Funding Information:
This work was supported by the NSF grants PHY-1724638 and PHY-2011161 .

Publisher Copyright:
© 2022 The Authors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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