An order-correction to the hyperfine structure of positronium due to the Källen-Sabry potential
- 1 October 1974
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 10 (4), 1450-1451
- https://doi.org/10.1103/physreva.10.1450
Abstract
The contribution to the positronium ground-state hyperfine structure due to the fourth-order vacuum polarization correction to the annihilation diagram is computed. The updated theoretical value is one standard deviation above experiment.Keywords
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