Production of Three Vector Bosons in e+e- Annihilation as a Test of W+-,   Z, gamma Self-Interactions
  We study the vector-boson production processes e+e- --> WWZ and e+e- -->WWgamma which are directly affected by the trilinear and quadrilinear self couplings of the W, Z and gamma. Our analysis is based upon a single-parameter effective-Lagrangian model for these self interactions which contains the standard model as a special case. Consequences for the phenomenology at an e+e- collider of 500 GeV (NLC) are discussed, and fits of the free parameter around its standard model value are carried out. 
C. Grosse-Knetter and D. Schildknecht (Universitaet Bielefeld,   Fakutaet fuer Physik, W-4800 Bielefeld, 1 Germany)