2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/155788Working with a completely collinear twist-3 factorized cross-section formula, we identify two largely dominant partonic sub-processes, which contribute to the single-spin asymmetries in semi-inclusive pion production, in the region of large pT and medium-large xF.4 pages, 2 figures, talk presented by Ramilli at the XII Advanced Research Workshop on High Energy Spin Physics (DSPIN-07), Dubna, 3-7 Sept. 2007High Energy Physics - Phenomenologytext