PROBING QUARTIC COUPLINGS OF WEAK BOSONS THROUGH 3 VECTOR PRODUCTION AT A 500 GEV NLC

We write down a minimal set of genuine four-coupling operators between vector bosons with have no connection to the standard parametrisation of the trilinear anomalous W couplings. We impose a global weak SU(2) symmetry and, for those operators where photons are involved, a local U(1)QED. These requirement are strong enough to forbid or highly suppress any contribution to weak vector boson self-energies. Tests of these couplings are then only possible at high energies. We study the effects of these couplings at the NLC (500 GeV) in all possible three vector boson productions: e+e- --> W+W-Z, ZZZ, W+W--gamma, ZZ-gamma and Z-gamma-gamma. We consider the possibility of having polarised beams and point out the usefulness of looking at particular distributions.