2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111250The chiral quark model combined with unitarity and impact parameter picture provides simple semiclassical mechanism for generation of the single-spin asymmetry $A_N$ in the $π^0$-production in the polarized proton collisions at RHIC. We derive its linear $x_F$-dependence in polarized proton fragmentation region along with the energy and transverse momentum independence at large $p_T$ values.13 pages, 4 figures, extended discussion, references addedHigh Energy Physics - Phenomenologytext