Nambu-Jona-Lasinio Model vs QCD

Details Nambu-Jona-Lasinio Model vs QCD Nambu-Jona-Lasinio Model vs QCD

1994-06-27

arxiv.org/abs/hep-ph/9406399v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 9 pages, UM-TH-94-20, DPNU-94-23

Scientific paper

We argue that the extended Nambu-Jona-Lasinio model which introduces four-quark interactions to describe hadron physics at low energies can be confronted with fundamental quantum chromodynamics by means of spectral sum rules. While there arise rather restrictive bounds on the strength of the effective four-quark interaction in the vector channel, introduction of the four-quark interaction in the pseudoscalar channel resolves a long standing puzzle of the sum rules.

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