Inelastic channels inWWscattering

If the electroweak symmetry-breaking sector becomes strongly interacting at high energies, it can be probed through longitudinal W scattering. We present a model with many inelastic channels in the WL{W}L$ scattering process, corresponding to the production of heavy fermion pairs. These heavy fermions affect the elastic scattering of ${W}L$'s by propagating in loops, greatly reducing the amplitudes in some charge channels. We conclude that the symmetry-breaking sector cannot be fully explored by using, for example, the ${W}L^{±{}}WL^± mode alone, even when no resonance is present; all WL{W}L→{W}LWL scattering modes must be measured.