2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47411Topological charge screening has been proposed as the mechanism responsible for the anomalous suppression in the first moment of the polarized proton structure function -- the `proton spin' effect. An immediate consequence is that this suppression should be target-independent, since the screening is a fundamental property of the QCD vacuum. Here, we study the possibility of testing the target-independent suppression in semi-inclusive target fragmentation processes at polarized HERA.Contribution to the proceedings of the 1997 Workshop on `Physics with Polarized Protons at HERA', DESY-Hamburg, DESY-Zeuthen and CERN, March-September 1997High Energy Physics - Phenomenologytext