Proton collision

Proton collision

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Credit: CMS 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. Before the collision the ions had been accelerated by the large hadron collider (LHC). A large number of particles (orange lines) were created by the collision. Among them was a Higgs boson. The particle was not seen, but is revealed through its decay products; a pair of Z bosons that each decay into a pair of muons (long red lines). The Higgs boson is thought to give other particles mass. The first sighting of it was announced by scientists at CERN on 4th July 2012.

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Keywords: a toroidal lhc apparatus, apparatus, atlas, black background, cern, collision, cosmological, cosmology, decay products, european particle physics laboratory, experiment, fundamental particles, geneva, god particle, higgs boson, large hadron collider, lhc, matter, muon pair, muons, particle accelerator, particle detector, particle physics, particle track, physical, physics, proton proton collision, proton-proton, research, structure of matter, subatomic particles, switzerland, trace, traces, tracks, trajectories, trajectory

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