Complete Result for Positronium Energy Levels at Order alpha6 m
Krzysztof Pachucki, Savely G. Karshenboim
Abstract
We have completed theoretical predictions for positronium energy levels through order alpha6 m by the calculation of the spin independent, radiative recoil correction. This contribution is significant and amounts to 10.64 MHz for the 1S state. We further perform detailed comparison of theoretical predictions to experimental results for 1S-2S and 2S-2P transitions.
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