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Extended Nambu-Jona-Lasinio Model vs QCD Sum Rules

Koichi Yamawaki·V. I. Zakharov
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Abstract

We argue that the extended Nambu-Jona-Lasinio model of hadrons can be be probed and constrained in a nontrivial way via QCD sum rules. While there arise rather restrictive bounds on the strength of the effective four-fermion interaction in the vector channel, introduction of the four-fermion interaction in the pseudoscalar channel could resolve a long standing puzzle of QCD sum rules. We speculate also on possible connection between effective four-quark interactions describing the low-energy phenomenology and ultraviolet renormalons of the fundamental QCD.

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Koichi Yamawaki, V. I. Zakharov. 1994-06-23. Extended Nambu-Jona-Lasinio Model vs QCD Sum Rules. https://arxiv.org/abs/hep-ph/9406373

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