alpha^2 corrections to parapositronium decay: a detailed description

Abstract

We present details of our recent calculation of alpha^2 corrections to the parapositronium decay into two photons. These corrections are rather small and our final result for the parapositronium lifetime agrees well with the most recent measurement. Implications for orthopositronium decays are briefly discussed.

18 pages, latex

References in corpus (3)

• alpha^2 corrections to parapositronium decay
• Analytic evaluation of the amplitudes for orthopositronium decay to three photons to one-loop order
• Virtual annihilation contribution to orthopositronium decay rate

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