HADRONIC COUPLINGS VIA QCD SUM-RULES USING 3-POINT FUNCTIONS - VACUUMSUSCEPTIBILITIES

We develop a three-point formalism to treat vacuum susceptibilities us ed for the coupling of currents to hadrons within the method of QCD su m rules. By introducing nonlocal condensates, with the space-time stru cture taken from fits to experimental parton distrbutions, we show tha t one can treat hadronic: coupling at zero or low momentum transfer as well as medium and asymptotic momentum transfers and obtain a general expression for the;vacuum susceptibilities df the two-point formalism . The pion susceptibility, for which there has been a major uncertaint y, is evaluated successfully with no new parameters.