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We use the technique of light-cone commutators to illuminate the physical picture of deep-inelastic scattering given by the parton model. We find that final-state interactions can be consistent with scaling, and occur in the deep-inelastic domain when vector gluons are present. We show how a nonvanishing longitudinal scaling function can emerge in a fermion parton model. Finally we study the anomalies which beset light-cone commutators in perturbation theory.
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Jackiw et al. (1972) studied this question.
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