Order α^4 R_{\infty} corrections to positronium P levels

Details Order α^4 R_{\infty} corrections to positronium P levels Order α^4 R_{\infty} corrections to positronium P levels

1993-09-21

arxiv.org/abs/hep-ph/9309302v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 15 pages, BudkerINP-93-80

Scientific paper

The order $\alpha^4 R_{\infty}$ corrections to positronium $P$ levels are found. The calculation is reduced to the ordinary perturbation theory for the nonrelativistic Schr\"odinger equation. The perturbation operators have the Breit-type structure and are obtained by calculating on-mass-shell diagrams. Found energy corrections constitute numerically $\delta E(2 ^1 P_1)=0.06$ MHz, $\delta E(2 ^3 P_2)=0.08$ MHz, $\delta E(2 ^3 P_1)=0.025$ MHz, $\delta E(2 ^3 P_2)=-0.58$ MHz.

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