The Single Photon Annihilation Contributions to the Positronium Hyperfine Splitting to Order $m_eα^6$

Details The Single Photon Annihilation Contributions to the Positronium Hyperfine Splitting to Order $m_eα^6$ The Single Photon Annihilation Contributions to the Positronium Hyperfine Splitting to Order $m_eα^6$

1997-07-13

arxiv.org/abs/hep-ph/9707337v1

Phys.Rev.Lett. 79 (1997) 3387-3390

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, latex, two eps figures included

Scientific paper

10.1103/PhysRevLett.79.3387

The single photon annihilation contributions for the positronium ground state hyperfine splitting are calculated analytically to order $m_e\alpha^6$ using NRQED. Based on intuitive physical arguments the same result can also be determined by a trivial calculation using results from existing literature. Our result completes the hyperfine splitting calculation to order $m_e\alpha^6$. We compare the theoretical prediction with the most recent experimental measurement.

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