2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37631The analysis of inclusive $π$-meson single spin asymmetry measurements was done. It was found that the single spin asymmetry starts to grow up at the same value of the $π$-meson energy in the center of mass system for fixed target experiments at the beam energy range from 13 to 200 GeV.9 pages, 8 figures, submitted to Sov. Journ of Nucl PhysHigh Energy Physics - Experimenttext