2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47951We estimate the size of the azimuthal asymmetry of the semi-inclusive pion production in the deep-inelastic scattering of a polarized lepton beam off an unpolarized nucleon target for the produced hadron, arising due to both nonperturbative and perturbative effects.2 pages, 1 figure, to appear in the proceedings of DIS'98, Brussels, 4-8 April'98High Energy Physics - Phenomenologytext