2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/113680I discuss some aspects of the universality of soft gluon dynamics in semileptonic and radiative decays at the threshold region.Contribution to the Proceedings of the XLIrst Rencontres de Moriond, QCD and High Energy Hadronic Interactions, La Thuile, Italy, March 18-25, 2006High Energy Physics - Phenomenologytext