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The History of Quantum Chromodynamics

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In 1964 Gell-Mann introduced the quarks as the basic constituents of the nucleons. In 1970 Gell-Mann and Harald Fritzsch assigned a new quantum number to the quarks, the “color”. Two years later the colors were used in the same way as the electric charge in Maxwell`s electrodynamics – the resulting gauge theory we called “Quantum Chromodynamics”. The strong forces are generated by the exchange of eight gluons. Today this theory is regarded as the correct theory of the strong interactions and of the nuclear forces.

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