ORDER M-ALPHA(8) CONTRIBUTIONS TO THE DECAY-RATE OF ORTHOPOSITRONIUM

Authors
LABELLE P LEPAGE GP MAGNEA U
Citation
P. Labelle et al., ORDER M-ALPHA(8) CONTRIBUTIONS TO THE DECAY-RATE OF ORTHOPOSITRONIUM, Physical review letters, 72(13), 1994, pp. 2006-2008
Citations number
11
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
72
Issue
13
Year of publication
1994
Pages
2006 - 2008
Database
ISI
SICI code
0031-9007(1994)72:13<2006:OMCTTD>2.0.ZU;2-5
Abstract
We discuss how contributions to the order O(malpha8) orthopositronium decay rate can be separated into two categories, one due to relativist ic momenta and calculable in terms of quantum electrodynamics scatteri ng amplitudes, the other due to low momenta and calculable in the simp ler framework of a low-energy effective theory. We report new results for all low-momentum contributions, and give a formula relating the re maining contributions to conventional (on-shell) quantum electrodynami cs scattering amplitudes.