Hadronic Couplings Via QCD Sum Rules Using Three-Point Functions: Vacuum Susceptibilities

Details Hadronic Couplings Via QCD Sum Rules Using Three-Point Functions: Vacuum Susceptibilities Hadronic Couplings Via QCD Sum Rules Using Three-Point Functions: Vacuum Susceptibilities

1997-06-16

arxiv.org/abs/hep-ph/9706376v1

Phys.Rev. D57 (1998) 2847-2852

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex file, 3 Figs

Scientific paper

10.1103/PhysRevD.57.2847

We develop a three-point formalism to treat vacuum susceptibilities used for the coupling of currents to hadrons within the method of QCD Sum Rules. By introducing nonlocal condensates, with the space-time structure taken from fits to experimental parton distrbutions, we show that one can treat hadronic coupling at zero or low momentum transfer as well as medium and asmptotic momentum transfers and obtain a general expression for the vacuum susceptibilities of the two-point formalism. The pion susceptibility, for which there has been a major uncertainty, is evaluated successfully with no new parameters.

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