Order (alpha^2 Gamma, alpha^3 Gamma) Binding Effects in Orthopositronium Decay

Details Order (alpha^2 Gamma, alpha^3 Gamma) Binding Effects in Orthopositronium Decay Order (alpha^2 Gamma, alpha^3 Gamma) Binding Effects in Orthopositronium Decay

2000-03-28

arxiv.org/abs/hep-ph/0003277v3

Phys.Rev.D62:111301,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, revtex. v2: higher order contributions included, references added. v3: check with muonium hyperfine splitting added

Scientific paper

10.1103/PhysRevD.62.111301

We present a new, simplified analysis of the low-energy electron-positron interaction, and use the resulting effective theory to calculate the binding effects that contribute to the decay rate, Gamma, of orthopositronium, through Order(alpha^3 ln(alpha) Gamma). We express the total decay rate in terms of the annihilation rate for a free electron and positron at threshold, which has just recently been computed to sufficient precision. Our result corrects errors in a previous analysis.

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