2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46086Characteristics of the available data are briefly summarized. Different theoretical approaches are reviewed with special attention to a non-perturbative model which explicitly takes the orbital motion of the valence quarks into account. The connection between such asymmetries and hyperon polarization in unpolarized reactions is discussed.Talk given at the Adriatico Research Conference: Trends in Collider Spin Physics, December 5-8, 1995, Trieste. 9 pages with 3 figuresHigh Energy Physics - Phenomenologytext