Weinberg proposed his version of the electroweak theory in 1967. Electromagnetism and the weak force were both known to operate by the interchange of subatomic particles. Electromagnetism can operate at potentially infinite distances by means of massless particles called photons, while the weak force operates only at subatomic distances by means of massive particles called bosons. Weinberg was able to show that despite their apparent dissimilarities, photons and bosons are actually members of the same family of particles. His work, along with that of Glashow and Salam, made it possible to predict the outcome of new experiments in which elementary particles are made to impinge on one another. An important series of experiments in 1982-83 found strong evidence for the W and Z particles predicted by these scientists' electroweak theory.
Weinberg conducted research at Columbia University and at the Lawrence
Berkeley Laboratory before joining the faculty of the University of
California at Berkeley in 1960. During part of his last two years there,
1968-69, he was visiting professor at the Massachusetts Institute of
Technology; he joined its faculty in 1969, moving to Harvard University
in 1973 and to the University of Texas at Austin in 1983.
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