Structure functions from deep inelastic lepton scattering

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Abstract

The current status of the nucleon structure functions as measured in charged lepton scattering is reviewed including the analysis of scale breaking and higher twists. Results of a new measurement of the ratio and the difference of the neutron and proton structure function are presented. The Gottfried sumrule appears to be broken indicating that d is more abundant than u in the proton. The status of the nuclear effects on structure functions is presented as measured in lepton scattering and Drell-Yan process on nuclear targets. The crucial question of whether nuclear effects break factorisation is investigated on the basis of currently available data.

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