Infrared Asymptotic Forms of the GIuon and Quark Propagators

The infrared asymptotic forms of the gluon and quark propagators are calculated using an approximation scheme to the Dyson·Schwinger equations, which was first developed in QED by Salam, Delbourgo and West. The power·law factor ().2 / q 2)b appears in the infrared asymptotic form of the gluon propagator. This factor influences the infrared asymptotic form of the quark propagator, which has the exponential damping factor exp [-2Km2 / Ip2- m2 1l at p2" " m2