γZ0 production and new physics in the TeV region

We discuss the experimental limits on compositeness that may come from a study of the γZ0 final state at the future e+e- and panti p accelerators. In the framework of the strongly coupled standard model, we present the effective interactions up to dimension six which contribute to the f + anti f → γZ0 process. We calculate the relevant cross sections and analyze the production rates at the LEP II and Tevatron I and II colliders. We give the values of the compositeness scale Λ which lead to the observable effects at those machines. (orig.)