Kaon-baryon coupling constants in the QCD sum rule approach

2000/03/31 by Seungho Choe
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevc.62.025204

published as Phys.Rev. C62 (2000) 025204 · revtex, 10 pages, 2 ps figures; substantial revision, results changed, to be published in Phys. Rev. C

arxiv created 2000/06/07 · openalex publication_date 2000/07/20 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We improve our previous QCD sum rule calculation on g_KN\ensuremathΛ and g_KN\ensuremathΣ coupling constants by including the contributions from higher dimensional condensates, 〈qg_s\ensuremathσ\ensuremath⋅Gq〉 and 〈qq〉〈(\ensuremathα_s/\ensuremathπ)G²〉, in the OPE. It is found that the contribution of these condensates is non-negligible compared to that of the quark condensates. Using a best-fit analysis we find |g_KN\ensuremathΛ|=2.49\ifmmode±\else\textpm\fi1.25 and |g_KN\ensuremathΣ|=0.395\ifmmode±\else\textpm\fi0.377.

Citations

• gπΛΣandgKΣΞfrom QCD sum rules
• The Octet Model and its Clebsch-Gordan Coefficients
• QCD sum rule calculation of the πNN coupling-revisited