Electron-positron particle collision event

Electron-positron particle collision event

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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: Electron-positron collision. Computer display showing the result of an electron/positron collision inside the ALEPH detector at CERN, the European particle physics lab. The collision occurred at the centre of the frame, and produced enormous energy. This energy condensed to form a Z- nought particle, which immediately decayed to form two tau leptons. These then decayed to form three pions (dotted yellow tracks) and an invisible neutrino travelling toward lower left, and a single pion with three neutrinos travelling toward upper right. The pions were absorbed by the electromagnetic calorimeter (inner red ring), and their energies are shown by the yellow histograms.

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Keywords: aleph, cern, collision event, computer screen, electron-positron collision, electronic display, particle physics, particle physics research, particle tracks, particles, pion, production of, tau-lepton, track, tracks, z-nought

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