COMPUTATION OF COEFFICIENT FUNCTIONS FOR AN EXPANSION OF PARAPOSITRONIUM DECAY WIDTH USING REDUCE

Details COMPUTATION OF COEFFICIENT FUNCTIONS FOR AN EXPANSION OF PARAPOSITRONIUM DECAY WIDTH USING REDUCE COMPUTATION OF COEFFICIENT FUNCTIONS FOR AN EXPANSION OF PARAPOSITRONIUM DECAY WIDTH USING REDUCE

1995-05-16

arxiv.org/abs/hep-ph/9505316v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

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Scientific paper

A kind of asymptotic expansion for calculation of the (para)positronium decay
rate is formulated. The method is completely relativistic and gauge invariant.
The expansion goes over the inverse square of relative momentum $k$ of two
photons in Euclidean region and the actual width is determined at $k^2=-m^2$,
$m$ being the electron mass.

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