EFFECTIVE VECTOR-BOSON APPROXIMATION APPLIED TO HADRON-HADRON COLLISIONS

An improved effective vector-boson approximation is applied to hadron- hadron collisions; The effective vector-boson approximation in this fo rm is accurate enough to reproduce the result of a complete perturbati ve calculation for the specific example of ZZ production within 10%. T his is true even far away from a possible Higgs boson resonance and th us in a region where the transverse intermediate vector bosons give th e dominant contribution. Simple approximate formulas which greatly red uce the calculational effort are derived. The full information about t he kinematics is, however, lost in these approximations. A comparison between the improved, the approximate, and existing formulations is pr esented.