Higher-order recoil corrections to energy levels of two-body systems

Publisher Website

1 October 1999

journal article
research article
Published by American Physical Society (APS) in Physical Review A

Vol. 60 (4) , 2792-2798
https://doi.org/10.1103/physreva.60.2792

Abstract

We have calculated a correction of order

m α^{7} \ln^{2} α

to energy levels of the general two-body system of spin-

\frac{1}{2}

particles with arbitrary masses. The result allows for the improved theoretical predictions of the

1 S - 2 S

and

2 S - 2 P

intervals in positronium. Further implications to the hydrogen-deuterium

1 S - 2 S

isotope shift are discussed also.

Keywords

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