New vector and axial-vector resonances from a strongly interacting electroweak sector

A model is reviewed which provides an effective lagrangian description of the standard model of electroweak interactions when the mass of the Higgs is greater than the tree level unitarity limit Mc∼1 Tev. The model can alternatively be seen as a different way of realizing the electroweak symmetry breaking, in a non-linear rather than in a linear way. A conjecture is made that vector and axial-vector bound states originate from such a strong interaction of Higgs and longitudinal W and Z. As a consequence of the non-linearity of the representation, vector bosons acquire mass and no golstone i left in the spectrum. The parameters of the new resonances are already constrained by mW, mZ and neutrino-nucleon deep inelastic scattering. High energy tests at e+e- machines and proton colliders are also discussed. (author)