2-LOOP CORRECTIONS TO THE ORTHOPOSITRONIUM AND PARAPOSITRONIUM DECAY-RATES DUE TO VACUUM POLARIZATION

Authors
ADKINS GS SHIFERAW Y
Citation
Gs. Adkins et Y. Shiferaw, 2-LOOP CORRECTIONS TO THE ORTHOPOSITRONIUM AND PARAPOSITRONIUM DECAY-RATES DUE TO VACUUM POLARIZATION, Physical review. A, 52(3), 1995, pp. 2442-2445
Citations number
26
Categorie Soggetti
Physics
Journal title
Physical review. A → ACNP
ISSN journal
10502947
Volume
52
Issue
3
Year of publication
1995
Pages
2442 - 2445
Database
ISI
SICI code
1050-2947(1995)52:3<2442:2CTTOA>2.0.ZU;2-S
Abstract
We have calculated all O(alpha(2)) corrections to the orthopositronium and parapositronium decay rates due to vacuum polarization graphs. Th ese contributions are independent of gauge and bound state formalism. Our results are +0.964 960(4) (alpha/pi)(2) for orthopositronium and $ 0.447 343 0(6) (alpha/pi)(2) for parapositronium relative to the lowes t order rates. We also have an improved result for the one-loop one-ph oton-annihilation orthopositronium decay graph of -0.814 057 4(10) (al pha/pi) times the lowest order rate.