Two- and three-point functions in the extended NJL model

Johan Bijnens, Joaquim Prades

Research output: Contribution to journalArticlepeer-review


The two-point functions in generalized Nambu-Jona-Lasinio models are calculated to all orders in momenta and quark masses to leading order in 1/Nc. The use of Ward identities and the heat-kernel expansion allows for a large degree of regularization independence. We also show how this approach works to the same order for three-point functions on the example of the vectorpseudoscalar-pseudoscalar three-point function. The inclusion of the chiral anomaly effects at this level is shown by calculating the pseudoscalar-vector-vector three-point function to the same order. Finally we comment on how (vector-) meson-dominance comes out in the presence of explicit chiral symmetry breaking in both the anomalous and the non-anomalous sectors.

Original languageEnglish
Pages (from-to)475-494
Number of pages20
JournalZeitschrift für Physik C Particles and Fields
Issue number3
Publication statusPublished - 1994 Sep 1
Externally publishedYes

Subject classification (UKÄ)

  • Subatomic Physics


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