Abstract
The external-field quantum chromodynamics (QCD) sum rules method is used to evaluate the coupling constants of the vector mesons ρ and ω to the nucleon and the , and Ξ baryons. It is shown that these coupling constants as calculated from QCD sum rules are consistent with SU(3)-flavor relations. By assuming ideal mixing, this leads to a determination of the ratio of the vector-meson octet: we find and for the vector and the magnetic ratios, respectively. The sensitivity of the results to the unknown vacuum susceptibility ζ is discussed. The coupling constants with SU(3)-breaking effects taken into account are also calculated.
- Received 15 June 2006
DOI:https://doi.org/10.1103/PhysRevC.74.045201
©2006 American Physical Society