On the squared spin-orbit correction to the positronium fine-structure splitting

1996/11/26 by I. B. Khriplovich, A. I. Milstein, Khriplovich, I. B. +3
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #physics.atom-ph

paper · pdf · doi:10.48550/arxiv.physics/9611021

3 pages, Latex

arxiv created 1996/11/26 · arxiv updated 2009/12/01

Abstract

In the recent paper by Zhang the order α⁴ R_∞ corrections to the positronium P levels were reconsidered. Those calculations confirm our corresponding results, except for the contribution due to the squared spin-orbit interaction. We present here a new derivation of our previous result for this last correction, this derivation being to our opinion both simple and convincing.

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