Tau particle decay in ALEPH detector

Tau particle decay in ALEPH detector

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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 and decay of tau leptons. Electronic display of an electron-positron collision in the ALEPH detector at CERN, the particle physics lab near Geneva. The display shows a cross-section of the detector, with the beam tube in the centre (blue) surrounded by detector components (blue & red). The electron & positron, accelerated to high energy in CERN's LEP collider, annihilate at centre to create a Z particle which decays into a tau-plus & a tau-minus. The Z & the taus live too briefly to be seen, but the taus are revealed by their typical '3+3' decay into two back-to-back sets of three pions (coloured tracks). The tau is a lepton, a heavy version of the electron & muon.

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Keywords: aleph detector, cern, computer screen, electronic display, force-carrying particles, gauge bosons, high-energy physics, lep collider, particle physics research, pionss, subatomic particles, tau particle, the particle odyssey, weak nuclear force, z particle

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