[en] This thesis describes how the decay W^± → μ^± ν was identified in the UA1 experiment at a centre of mass energy of 630 GeV. An analysis of the W^± events is discussed in terms of the Standard Model. In the third chapter, the UA1 experiment is described, with emphasis placed on the muon detector. The fourth chapter explains the methods used for muon identification. The fifth chapter gives an application of these methods, a measurement of the inclusive p_T spectrum. Known muon and muon background sources are summarized. The sixth chapter deals with the W^± → μ^±ν selection, concentrating on acceptance and background calculations. In the subsequent chapter, the decay and production properties of the intermediate vector bosons are discussed in the frame work of the Standard Model. The W^± → μ^±ν sample is used to determine cross section times branching ratio and the mass of the W^±. Results are compared with findings in the electron decay channel. Both electron and muon samples are combined in the further analysis. Parameters of the Standard Model are determined from the masses of the intermediate vector bosons and are compared to theoretical predictions and measurements from other experiments. The angular distribution of the leptons from the W^± decay provides a confirmation of parity violation in electroweak interactions. From the ratio of σ.B of W^± and Z⁰ a limit on the number of light neutrino species is derived. (orig./HSI)