An experiment is reported, which firstly proves the existence of neutral weak interactions. The experiment is carried out with a 200-GeV muon beam scattered at a carbon target by means of asymmetry measurements. The schematic construction of the experimental plant NA4 in the European Nuclear Science Center (CERN) is described. Klein,-M.; Nowak,-W.D.; Riemann,-T. (Akademie der Wissenschaften der DDR, Berlin-Zeuthen. Inst. fuer Hochenergiephysik)
