2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42596We discuss the validity of factorization for exclusive two-body B to charmonium transitions. In particular, we consider the role of non factorizable corrections in selected two-body modes.Invited talk at the Workshop on the CKM Unitarity Triangle, IPPP Durham, April 2003 (eConf C0304052). 4 pages LaTeX, 2 eps figuresHigh Energy Physics - Phenomenologytext