Kaon-baryon coupling constants in the QCD sum rule approach
Nuclear Theory
2009-11-06 v2 High Energy Physics - Phenomenology
Abstract
We improve our previous QCD sum rule calculation on G(KN\Lambda) and G(KN\Sigma) coupling constants by including the contributions from higher dimensional condensates, <\bar{q} g_s \sigma \cdot G q> and <\bar{q}q> <(\alpha_s /\pi) 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(KN\Lambda)| = 2.49 1.25 and |G(KN\Sigma)| = 0.395 0.377.
Cite
@article{arxiv.nucl-th/0003024,
title = {Kaon-baryon coupling constants in the QCD sum rule approach},
author = {Seungho Choe},
journal= {arXiv preprint arXiv:nucl-th/0003024},
year = {2009}
}
Comments
revtex, 10 pages, 2 ps figures; substantial revision, results changed, to be published in Phys. Rev. C