Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, D-69120 Heidelberg, Germany
Received: 1 February 1999 / Published online: 30 June 1999
We analyse CP-violating effects in Z 4 jet decays, assuming the presence of CP-violating effective and couplings. We discuss the influence of these couplings on the decay width. Furthermore, we propose various strategies of a direct search for such CP-violating couplings by using different CP-odd observables. The present data of LEP 1 should give significant information on the couplings.