2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47490The perturbative QCD provides a good overall description of both the jet and hadron multiplicities in the $e^+e^-$ annihilation reaction. In this description the hadrons are considered as dual to partons at a small resolution parameter $Q_0$ characteristic of a hadronic scale of few hundred MeV.To be publ. in Proceedings of the Int. Europhysics Conference on High Energy Physics (Jerusalem,August 1997), 3 pages, 1 figure, LaTexHigh Energy Physics - Phenomenologytext