Extended Nambu-Jona-Lasinio Model vs QCD Sum Rules

Details Extended Nambu-Jona-Lasinio Model vs QCD Sum Rules Extended Nambu-Jona-Lasinio Model vs QCD Sum Rules

1994-06-23

arxiv.org/abs/hep-ph/9406373v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 18 pages, UM-TH-94-19, DPNU-94-19

Scientific paper

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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