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arXiv · hep-ph/9406201

Calculation of the Four-Quark Condensates in the QCD Motivated Nambu-Jona- Lasinio Model

Qing Wang·Yu-Ping Kuang·Yu-Ping yi·Tian-Fang Cai
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Abstract

The four-quark condensates appearing in QCD sum rule are calculated nonperturbatively in a realistic QCD motivated extended Nambu-Jona-Lasinio model. The calculation is in the framework of the effective potential for local composite operators up to next-to-the-leading order in the 1/N expansion in which the non-factorized parts of the condensates are included. We show in this paper the possibility of explaining the phenomenological enhancement factor $~κ=2.4~$, needed for fitting the data in the factorization approximation, as the contribution of the non-factorized parts of the four- quark condensates.

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Qing Wang, Yu-Ping Kuang, Yu-Ping yi, Tian-Fang Cai. 1994-06-01. Calculation of the Four-Quark Condensates in the QCD Motivated Nambu-Jona- Lasinio Model. https://doi.org/10.1016/0370-2693(94)00983-x

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