Abstract
Relativistic O(${\mathrm{\ensuremath{\alpha}}}^{2}$) corrections to the orthopositronium decay rate are calculated on the basis of a local quasipotential equation. We take into account the necessary contributions resulting from the amplitude of three-photon decay, the normalization condition of the wave function, and the second-order perturbation theory.
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Schedule a callMore From: Physical review. A, Atomic, molecular, and optical physics
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