Seminarium Fizyki Wielkich Energii

I will present over 40 years of involvement by Warsaw groups in studying the (spin) structure of the nucleon through CERN SPS muon experiments—including EMC, NMC, SMC, and COMPASS. While these experiments have led to many intriguing physics insights, precise answers to key questions remain elusive due to the kinematic limitations of fixed-target setups. This is set to change with the upcoming Electron-Ion Collider (EIC), the world’s first polarized electron-proton collider, which promises unprecedented access to the nucleon’s spin structure.