SUMMARY OF THE WORKSHOP ON TESTING QCD THROUGH SPIN OBSERVABLES IN NUCLEAR TARGETS

摘要

Polarized targets solid and gaseous have played a very crucial and important role in the exploration of polarized parton distributions in the nucleons. They have in the recent past enabled high statistics experiments which have not only explored the nucleon spin structures with unprecedented precision, and potential for detailed investigations of polarized light nuclei. This has enabled first investigations of nuclear effects in nuclear DIS. We look forward to experiments providing significant data on higher twist effects. We expect that the polarized gas and solid state targets will continue to play a leading role in the measurements of partonic structure of nuclei and nucleons especially at high x where we still have very scanty data. The traditional spin structure function measurements and the interested nuclear physics community seems to move towards collider experiments in the future. Colliders, by allowing for higher s~(1/2), enable clean measurements in purely perturbative QCD regimes. This is not only true for the hadron-hadron colliders but also in the case of future e-N colliders. Collider geometry can be cleverly utilized by designing a detector appropriately to detect for the first time target and beam fragments for the polarized scattering. Such a collider will take the field of polarized DIS in a new era.