Abstract

Precise measurements of nuclear effects in the production of massive lepton pairs from heavy targets by pion and proton beams would extend knowledge of the nuclear dependence of antiquark and quark structure functions of nucleons into important intervals of the fractional longitudinal momentum variable x Bj not easily accessible in deep inelastic scattering. Isolating nuclear dependence is also essential before definite conclusions can be drawn on the behavior of the pion structure function and on the magnitude and kinematic variation of the perturbative QCD K-factor obtained from heavy target data.

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