Meson Cloud of the Nucleon in Polarized Semi-Inclusive Deep-Inelastic Scattering
Abstract
We investigate the possibility of identifying an explicit pionic component of the nucleon through measurements of polarized ++ baryon fragments produced in deep-inelastic leptoproduction off polarized protons, which may help to identify the physical mechanism responsible for the breaking of the Gottfried sum rule. The pion-exchange model predicts highly correlated polarizations of the ++ and target proton, in marked contrast with the competing diquark fragmentation process. Measurement of asymmetries in polarized production may also reveal the presence of a kaon cloud in the nucleon.
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