A Nonlocal, covariant generalization of the NJL model
Jul 25, 199413 pages
Published in:
- Nucl.Phys.A 582 (1995) 655-664
e-Print:
- hep-ph/9407336 [hep-ph]
Report number:
- M-C-TH-94-17
Citations per year
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.- Jona-Lasinio-Nambu model
- field theory: nonlocal
- dynamical symmetry breaking
- quark: condensation
- quark: confinement
- mass spectrum
- Bethe-Salpeter equation: solution
- renormalization
- pi: decay constant
- decay constant: pi
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