Kaon-baryon coupling constants in the QCD sum rule approach - art. no. 025204

Authors
Citation
S. Choe, Kaon-baryon coupling constants in the QCD sum rule approach - art. no. 025204, PHYS REV C, 6202(2), 2000, pp. 5204
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
0556-2813 → ACNP
Volume
6202
Issue
2
Year of publication
2000
Database
ISI
SICI code
0556-2813(200008)6202:2<5204:KCCITQ>2.0.ZU;2-9
Abstract
We improve our previous QCD sum rule calculation on g(KN Lambda) and g(KN S igma) coupling constants by including the contributions from higher dimensi onal condensates, [(q) over bar g(s)sigma . Gq] and [(q) over bar q][(alpha (s)/pi)G(2)], in the OPE. It is found that the contribution of these conden sates is non-negligible compared to that of the quark condensates. Using a best-fit analysis we find \g(KN Lambda)\ = 2.49+/-1.25 and \g(KN Sigma)\ = 0.395+/-0.377.