Abstract
Recent New Muon Collaboration measurements of p-n asymmetries in F 2 structure functions through deep-inelastic muon scattering suggest possible SU(2)-flavor breaking in the nucleon sea. Ellis and Stirling showed that asymmetries in Drell-Yan processes for protons scattered from proton and deuteron targets could shed light on the sea and valence structure functions. We show that the relevant quantity d(x) - ū(x) could be extracted directly from such measurements at appropriate kinematic values
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