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From the Feynman-Schwinger representation to the non-perturbative relativistic bound state interaction

Nora Brambilla·Antonio Vairo
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Abstract

We write the 4-point Green function in QCD in the Feynman-Schwinger representation and show that all the dynamical information are contained in the Wilson loop average. We work out the QED case in order to obtain the usual Bethe-Salpeter kernel. Finally we discuss the QCD case in the non-perturbative regime giving some insight in the nature of the interaction kernel.

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Nora Brambilla, Antonio Vairo. 1997-06-06. From the Feynman-Schwinger representation to the non-perturbative relativistic bound state interaction. https://doi.org/10.1103/physrevd.56.1445

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