2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40275Reported is a factorization theorem for large-s behavior of total cross sections obtained in a straightforward fashion from ordinary perturbation theory. The theorem extends the standard factorization results for the Bjorken and Drell-Yan processes. The obtaining of useful evolution equations is found to be problematic. A by-product is a direct method for systematic calculations of the parton evolution kernels.12p PSHigh Energy Physics - Phenomenologytext