1993/09/21 by И. Б. Хриплович, I. B. Khriplovich, A. I. Milstein +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9309302
LaTeX, 15 pages, BudkerINP-93-80
openalex publication_date 1993/09/21 · arxiv created 1993/09/27 · arxiv updated 2009/11/30 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28
The order α4 R∞ corrections to positronium P levels are found. The calculation is reduced to the ordinary perturbation theory for the nonrelativistic Schrödinger equation. The perturbation operators have the Breit-type structure and are obtained by calculating on-mass-shell diagrams. Found energy corrections constitute numerically δE(2 1 P1)=0.06 MHz, δE(2 3 P2)=0.08 MHz, δE(2 3 P1)=0.025 MHz, δE(2 3 P2)=-0.58 MHz.