Single Photon Annihilation Contributions to the Positronium Hyperfine Splitting to Order
- 3 November 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 79 (18) , 3387-3390
- https://doi.org/10.1103/physrevlett.79.3387
Abstract
The single photon annihilation contributions for the positronium ground state hyperfine splitting are calculated analytically to order using nonrelativistic QED. Based on intuitive physical arguments the same result can also be determined using results from previous calculations. Our result completes the hyperfine splitting calculation to order . We compare the theoretical prediction with the most recent experimental measurement.
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