Non-perturbative Aspects of QCD and Parameterized Quark Propagator

Based on the Global Color Symmetry Model, the non-perturbative QCDvacuum is investigated in the parameterized fully dressed quarkpropagator. Our theoretical predictions for various quantitiescharacterized the QCD vacuum are in agreement with those predictedby many other phenomenological QCD inspired models. The successfulpredictions clearly indicate the extensive validity of ourparameterized quark propagator used here. A detailed discussion onthe arbitrariness in determining the integration cut-off parameterof μ in calculating QCD vacuum condensates and a good method,which avoided the dependence of calculating results on the cut-offparameter is also strongly recommended to readers.