Discovery of the Z particle

Discovery of the Z particle

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Restrictions: Editorial use only. This image may not be used to state or imply endorsement by CERN of any product, activity or service

Caption: Discovery of the Z particle, one of the carriers (or gauge particles) of the weak nuclear force. The photographically coloured version of the original electronic image shows the tracks of an electron-positron pair (coloured gold) emerging back-to-back from the point where a proton & an antiproton collided at high energy in the Super- Proton-Synchrotron (SPS) collider at CERN, Geneva. The collision also produced a debris of other particles whose tracks are visible. The Z particle itself lives too briefly to be seen, but its existence is deduced from the "signature" of the electron-positron pair. The data was recorded by the UA1 detector at CERN on April 30, 1983.

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Keywords: computer screen, electronic display, gauge particles, historical, particle physics research, z particle

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