In the late 1960's, physicists Steven Weinberg, Abdus Salam, and Sheldon Glashow...

In the late 1960's, physicists Steven Weinberg, Abdus Salam, and Sheldon Glashow conquered the next unification frontier. In a phenomenal piece of scientific work they showed that the electromagnetic and weak nuclear forces are nothing but different aspects of the same force, subsequently dubbed the electroweak force. The predictions of the new theory were dramatic. The electromagnetic force is produced when electrically charged particles exchange between them bundles of energy called photons. The photon is therefore the messenger of electromagnetism. The electroweak theory predicted the existence of close siblings to the photon, which play the messenger role for the weak force. These never-before-seen particles were prefigured to be about ninety times more massive than the proton and to come in both an electrically charged {called W} and a neutral {called Z} variety. Experiments performed at the European consortium for nuclear research in Geneva {known as CERN for Conseil Europeen pour la Recherche Nucleaire} discovered the W and Z particles in 1983 and 1984 respectively.

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