ar X iv : h ep - p h / 95 12 35 8 v 1 1 9 D ec 1 99 5 December 14 , 1995 LBL - 38044

A method to embed models of strong WW scattering in unitary gauge amplitudes is presented that eliminates the need for the effective W approximation (EWA) in the computation of cross sections at high energy colliders. The cross sections obtained from the U-gauge amplitudes include the distributions of the final state fermions in ff → ffWW , which cannot be obtained from the EWA. Since the U-gauge method preserves the interference of the signal and the gauge sector background amplitudes, which is neglected in the EWA, it is more accurate, especially if the latter is comparable to or bigger than the signal, as occurs for instance at small angles because of Coulomb singularities. The method is illustrated for on-shell WW → WW scattering and for qq → qqWW. This work was supported by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the U.S. Department of Energy under Contract DE-AC03-76SF00098. Email: [email protected]