Relations between the QCD sum rules for BBV couplings and vector-dominance model

4th International Hadron Physics Conference

Zamiralov, Valeri^1

Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia^1

关键词: Correlation function;    Coupling constants;    QCD sum rules;    Sum rule;    Super-convergence;    Unitary symmetry;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/562/1/012005/pdf
DOI  :  10.1088/1742-6596/562/1/012005

来源: IOP

【 摘 要 】

Story of QCD sum rules is briefly reviewed. The dispersion superconvergence sum rule is shown to relate πN coupling constant with the 33-resonance width without unitary symmetry arguments. The QCD sum rules instead reveal the unitary symmetry pattern as all the correlation functions can be reduced to 2 ones repeating the F and D couplings for the octet baryons 1/2+. Strong relations between the correlators are established. Vector dominance hypothesis allows to put new restrictions to the QCD sum rules for VBB couplings.