Proton collision

Proton collision

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Credit: ATLAS EXPERIMENT, 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: Particle tracks from a proton-proton collision seen by the ATLAS (a toroidal LHC apparatus) detector at CERN (the European particle physics laboratory) near Geneva, Switzerland. Shaded areas are elements of the detector. Before the collision the ions had been accelerated to 7 TeV (tera electron volts) by the large hadron collider (LHC). The collision produced a W boson, which quickly decayed in to a tau lepton and a neutrino. Neither the W boson nor the tau lepton were seen, but were revealed through the decay products of the tau lepton; hadron particles (yellow lines) and a neutrino (not seen).

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Keywords: a toroidal lhc apparatus, atlas, black background, cern, collision, cosmological, cosmology, decay products, european particle physics laboratory, experiment, fundamental particles, geneva, large hadron collider, lhc, matter, particle accelerator, particle detector, particle physics, particle track, physical, physics, proton proton collision, proton-proton, research, structure of matter, switzerland

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