| The NJL model has been effectively applied to investigate the chiral symmetry breaking and other related phenomena on the quark model. We extended the regular NJL with a covariant lorentz-vector model of confinement, and made a trial to build a nonlocal NJL model. By using this noval model, we suggest to use temperature-dependent and density-dependent coupling constants. Some calculations are made to compare with QCD and lattice QCD results. These result shows our generalized NJL model demonstrates better agreement with the corresponding QCD results. |
