Hard nonlogarithmic corrections of order mα7 to hyperfine splitting in positronium

Michael I. Eides, Valery A. Shelyuto

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We consider hard three-loop nonlogarithmic corrections of order mα7 to hyperfine splitting in positronium. All these contributions are generated by the graphs with photon and/or electron loop radiative insertions in the two-photon exchange diagrams. We calculate contributions of six gauge-invariant sets of diagrams. The total result for all these diagrams is ΔE=-1.2917(1)mα7/π3=-5.672kHz.

Original languageEnglish
Article number111301
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume89
Issue number11
DOIs
StatePublished - Jun 30 2014

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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