2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37039The HERMES and SMC experiments have determined the contribution of different quark flavors to the nucleon spin in a large range of Bjorken-x via semi-inclusive deep inelastic scattering. The main goal of the COMPASS experiment is to measure the gluon polarization in the nucleon. In all experiments a polarized lepton is scattered off a polarized nucleon. Latest results from HERMES and perspectives for COMPASS running in 2001 and beyond are presented.4 pages, 2 figures, Contribution to the XXXVIth Rencontres de Moriond - "QCD and High Energy Hadronic Interactions" - Les Arcs (Fr), March 17-24, 2001High Energy Physics - Experimenttext