GENERALIZED FORWARD SCATTERING-AMPLITUDES IN QCD AT HIGH-TEMPERATURE

We extend to a general class of covariant gauges an approach which rel ates the thermal Green functions to forward scattering amplitudes of t hermal particles. A brief discussion of the nontransversality of the t hermal gluon polarization tensor is given in this concert. This method is then applied to the calculation of the In (T) contributions associ ated with general configurations of two-and three-point gluon function s. The results are Lorentz covariant and have the same structure as th e ultraviolet divergent contributions which occur at zero temperature.