A nonlocal, covariant generalisation of the NJL model

Preprint

20 July 1994

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/9407336

Abstract

We solve a nonlocal generalisation of the NJL model in the Hartree approximation. This model has a separable interaction, as suggested by instanton models of the QCD vacuum. The choice of form factor in this interaction is motivated by the confining nature of the vacuum. A conserved axial current is constructed in the chiral limit of the model and the pion properties are shown to satisfy the Gell-Mann--Oakes--Renner relation. For reasonable values of the parameters the model exhibits quark confinement.

Keywords

COVARIANT GENERALISATION
NONLOCAL GENERALISATION
MOTIVATED
NJL MODEL
VACUUM
CHIRAL
OAKES
QCD

All Related Versions

Version 1, 1994-07-20, ArXiv
Published version: Nuclear Physics A, 582 (3-4), 655.

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