INDIRECT EFFECTS OF NEW RESONANCES AT FUTURE LINEAR COLLIDERS

In this paper we consider a general SU(2)(L) x SU(2)(R) invariant Lagr angian describing scalar, vector and axial-vector resonances. By expan ding the WW and the ZZ scattering amplitude up to the fourth order in the external momenta we can compare the parameters of our Lagrangian w ith the ones used in the effective chiral Lagrangian formalism. In the last approach there has been a recent study of the fusion processes a t future e(+)e(-) colliders at energies above 1 TeV. We use these resu lts to put bounds on the parameter space of our model and to show that for the case of vector resonances the bounds obtained from the annihi lation channel in fermion pairs are by far more restrictive, already a t energies of the order of 500 GeV. (C) 1997 Elsevier Science B.V.