Subject:

Theoretical High Energy Physics 
Organization:

Theoretical High Energy Physics 
Journal title:

Physical Review C. Nuclear Physics

Abstract:

The externalfield quantum chromodynamics (QCD) sum rules method is used to evaluate the coupling constants of the vector mesons rho and omega to the nucleon and the Lambda,Sigma, and Xi 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 F/(F+D) ratio of the vectormeson octet: we find alpha<SUB>v</SUB>=1 and alpha<SUB>m</SUB>=0.18 for the vector and the magnetic F/(F+D) ratios, respectively. The sensitivity of the results to the unknown vacuum susceptibility zeta is discussed. The coupling constants with SU(3)breaking effects taken into account are also calculated.
