In January the UA1 collaboration working at the new CERN proton–antiproton collider announced the discovery of the charged intermediate vector boson, or W. The electroweak theory unifying the weak and electromagnetic interactions, for which Sheldon Glashow, Abdus Salam and Steven Weinberg received the 1979 Nobel prize in physics, requires the existence of three massive intermediate bosons, or weakons, with spin 1—the Z0, the W+ and W, to mediate the electroweak interaction.

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