Analytic evaluation of the one-loop orthopositronium decay amplitudes
Journal Article
·
· Bulletin of the American Physical Society
OSTI ID:394242
The decay of orthopositronium to three photons can be studied using a method of covariant amplitudes previously used to calculate the Z {r_arrow} 3{gamma} partial decay rate. Three independent amplitudes are needed to describe the decay. The orthopositronium decay amplitudes were calculated analytically to one-loop order using the method of Passarino and Veltman for evaluating one-loop integrals. The amplitudes are given in terms of dilogrithms, logarithms, and other elementary functions. These amplitudes were used to find new, higher precision results for the one-loop decay rate and the contribution to the two-loop decay rate coming from the squares of the one-loop amplitudes.
- OSTI ID:
- 394242
- Report Number(s):
- CONF-9605105--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 41; ISSN BAPSA6; ISSN 0003-0503
- Country of Publication:
- United States
- Language:
- English
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