Electron-positron pair in ALEPH detector

Electron-positron pair in ALEPH detector

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This image is part of the feature Particle Art

Credit: CERN/SCIENCE PHOTO LIBRARY

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

Caption: Production of an electron-positron pair, matter & antimatter, in the ALEPH detector at CERN, the European particle physics lab outside Geneva. In this electronic display, the basically cylindrical detector is outlined in white & blue. An electron and positron, accelerated to high energy in CERN's LEP collider, have entered (unseen) from left & right & annihilated in the centre of the detector to produce sprays of charged particles (blue dotted tracks). Also produced is an unseen gamma- ray photon, which materialises as matter and antimatter in the form of an electron (yellow) and positron (red). Because they are of lower energy, they travel in spirals in ALEPH's magnetic field.

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Keywords: aleph detector, antimatter, cern, computer screen, electron-positron pair, electronic display, electrons, high-energy physics, lep collider, leptons, matter, particle physics research, positrons, spirals, subatomic particles, the particle odyssey

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