A nonlocal, covariant generalisation of the NJL model

Details A nonlocal, covariant generalisation of the NJL model A nonlocal, covariant generalisation of the NJL model

1994-07-20

arxiv.org/abs/hep-ph/9407336v1

Nucl.Phys.A582:655-664,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages (RevTeX), MC/TH 94/17

Scientific paper

10.1016/0375-9474(94)00481-2

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.

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