The observation of hadron jets from electron-positron collisions (LEP) is explained (e.g. Wilczek, The Lightness of Being, p 55) as follows- e,p collide and produce a virtual photon. the photon goes into a quark, antiquark pair, and one jet of hadrons comes out of the quark, and an opposing jet comes out of the anti-quark.
Question: How can a quark with fractional electric charge produce a jet of particles that all have integral electric charge? What happens to electric charge conservation in the process?
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