A nonlocal, covariant generalisation of the NJL model
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 GellMannOakesRenner relation. For reasonable values of the parameters the model exhibits quark confinement.
 Publication:

Nuclear Physics A
 Pub Date:
 February 1995
 DOI:
 10.1016/03759474(94)004812
 arXiv:
 arXiv:hepph/9407336
 Bibcode:
 1995NuPhA.582..655B
 Keywords:

 High Energy Physics  Phenomenology;
 Nuclear Theory
 EPrint:
 13 pages (RevTeX), MC/TH 94/17