Abstract
Nuclear structure functions in deep-inelastic lepton-nucleus scattering are carefully evaluated. The dynamics of valence quarks is treated so as to reproduce the right behavior of the proton structure function at large x. This enables us to determine high-momentum components in the nuclear Fermi motion up to a momentum region which has not yet been determined by any other nuclear reaction. Then, we calculate the structure function ratio (EMC effect) between iron and protons (or deuterons). Thereby, we assume sea quarks to feel no nuclear Fermi motion. The present model explains the main part of the EMC effect. The scaling violation arising from the nuclear Fermi motion is also discussed.
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