2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/220070We consider a model of transverse momentum production in which non-perturbative smearing takes place throughout the perturbative evolution, by a simple modification to an initial state parton shower algorithm. Using this as the important non-perturbative ingredient, we get a good fit to data over a wide range of energy. Combining it with the non-perturbative masses and cutoffs that are a feature of conventional parton showers also leads to a reasonable fit. We discuss the extrapolation to the LHC.14 pages, 6 figures; version accepted by JHEPHigh Energy Physics - Phenomenologytext