Electronic display of a three jet event

Electronic display of a three jet event

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Credit: DAVID PARKER/SCIENCE PHOTO LIBRARY

Caption: Electronic display of a three-jet event in the High- Resolution Spectrometer (HRS) detector at the SLAC particle physics laboratory in Stanford, California. An electron & a positron have collided in the detector and annihilated into pure energy which rematerialises in the form of a quark, an antiquark & a gluon radiated by one of the quarks. These particles are not visible because they immediately decay into 3 jets of other particles whose tracks are represented by white dots. Events like this are the closest physicists have come to "seeing" gluons, the mediators of the strong nuclear force which holds together quarks & part- icles made of quarks such as protons & neutrons. (Run 2436, Event 16362) (Jun '84)

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Keywords: antiquark, computer screen, electron-positron collision, electronic display, gluon, hadron, high-resolution, hrs detector, jet, particle, particle physics research, quark, slac, spectrometer, three-jet event

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