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

Research output: Contribution to journalArticle


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.


External organisations
  • Niels Bohr Institute
  • Nordic Institute for Theoretical Atomic Physics (NORDITA), Copenhagen
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

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