2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40764We compare the numerical predictions of the k_T-factorization approach (semihard theory) for heavy quark production in high energy nucleon-nucleon and photon-nucleon collisions with the experimental data from Tevatron-collider and HERA. Predictions for heavy quark production at Tevatron, LHC and HERA are also presented.13 pages, LaTeX, 12 PostScript figuresHigh Energy Physics - Phenomenologytext