Plate 1: Three jets (quark, antiquark, and gluon)
Plate 1: Photograph taken at the Large Electron-Positron collider (LEP) that operated at CERN, near Geneva, through the 1990s.
Three jets of particles emerge from this collision, in precisely the flow patterns predicted for a quark, an antiquark, and a gluon.
Particle jets give operational meaning to particles like quarks and gluons, even though they cannot be "observed" in the usual sense.
More about this image
Source: CERN-EX-9106038 L3: Decay of Z0 to three jets
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