Hyperfine splitting in positronium to ${\cal O}(\alpha^7m_e)$: one-photon annihilation contribution

Alexander Penin; Jan Piclum; Marc Baker; Matthias Steinhauser; Peter Marquard

arxiv: 1402.0876 · v1 · pith:EA6H4BB2new · submitted 2014-02-04 · ✦ hep-ph

Hyperfine splitting in positronium to {cal O}(α⁷m_e): one-photon annihilation contribution

Marc Baker , Peter Marquard , Alexander Penin , Jan Piclum , Matthias Steinhauser This is my paper

classification ✦ hep-ph

keywords alphaannihilationcontributionhyperfineone-photonpositroniumsplittingcomplete

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We present the complete result for the ${\cal O}(\alpha^7m_e)$ one-photon annihilation contribution to the hyperfine splitting of the ground state energy levels in positronium. Numerically it increases the prediction of quantum electrodynamics by $217\pm 1$ kHz.

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Hyperfine splitting in positronium to {cal O}(α⁷m_e): one-photon annihilation contribution

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