
In 1964, Gell-Mann [1] and Zweig [2] proposed that hadrons, the particles which experience strong interactions, are made of quarks. Quarks are confined within hadrons and never seen in isolation. Electron-nucleon scattering experiments at large momentum transfer could be explained by assuming the nucleon is made of almost-free point-like constituents called partons [3, 4, 5].
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| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
