Abstract
The simple SU(2)69 U(1) eleetroweak theory impresses by its uninterrupted series of successes when confronted with experiments. The crucial discovery of weak new tral currents in Garg~melle 1973 paved the way to this type of theoretical models as opposed to models with heavy gang~ leptons. Further neutrino experiments and the observation of a parity violating asymmetry in ed scattering filtered out from the variety of competing models, in only six years or so, the one which became then the Standard Model . e+e-experiments at PETRA, P EP and TRISTAN extended the range of validity into the Q2 range on the order of 10 z GeV z. The Sp~ S collider experiments have observed, 10 years after the discovery of weak neutral currents, the heavy gauge bosons with mass values as antidpated on the basis of low energy measurements.
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