Kaon-baryon coupling constants in the QCD sum rule approach

Abstract

We improve our previous QCD sum rule calculation on G(KNΛ) and G(KNΣ) coupling constants by including the contributions from higher dimensional condensates, <\bar{q} g_s σ\cdot G q> and <\bar{q}q> <(α_s /π) G^2>, 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(KNΛ)| = 2.49 $\pm$ 1.25 and |G(KNΣ)| = 0.395 $\pm$ 0.377.

revtex, 10 pages, 2 ps figures; substantial revision, results changed, to be published in Phys. Rev. C

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Cited by in corpus (2)

• Meson-octet-baryon couplings using light cone QCD sum rules
• Meson-Baryon Couplings from QCD Sum Rules