Radiative corrections to parapositronium decay

Radiative corrections to the two-gamma decay of parapositronium are examined. Special care is taken in the handling of the so-called binding diagram; in particular, the limiting procedure related to the infrared divergence is considered carefully. The general covariant gauges and the Fried-Yennie ga...

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Bibliographic Details
Published in:Annals of physics 1980-01, Vol.128 (2), p.463-490
Main Author: Tomozawa, Yukio
Format: Article
Language:English
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Summary:Radiative corrections to the two-gamma decay of parapositronium are examined. Special care is taken in the handling of the so-called binding diagram; in particular, the limiting procedure related to the infrared divergence is considered carefully. The general covariant gauges and the Fried-Yennie gauge are used in the computation to see that gauge invariance is accounted for. The order α correction of Harris and Brown is confirmed. In addition, from a sharp peak of the matrix element at low momentum and the low-momentum correction to the wave function, an α 2 ln α −1 correction is derived.
ISSN:0003-4916
1096-035X
DOI:10.1016/0003-4916(80)90329-2