alpha^2 corrections to parapositronium decay: a detailed description

Details alpha^2 corrections to parapositronium decay: a detailed description alpha^2 corrections to parapositronium decay: a detailed description

1999-10-26

arxiv.org/abs/hep-ph/9910488v2

Phys.Rev. A61 (2000) 052502

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, latex

Scientific paper

10.1103/PhysRevA.61.052502

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.

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