E+e-collisions in the Multi-tev Region*

A leading role in the elucidation of the Standard Model during the last few years has been played by e+ecolliding beam experiments. They have advanced our understanding more than have hadron-hadron collision experiments during the same period. The e+ediscoveries have been made possible by the cleanliness of the experimental conditions and the ability to tune the centre-of-mass energy with precision to the desired value, thus avoiding less interesting background events. Whereas the great challenge in hadronic experiments has been to devise techniques for locating the needle in the haystack, in e+eexperiments there is “little chaff to separate from the wheat.