2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37498Recent CLEO results on the observation of the $Υ(1D)$ state and a search for the $η_b(1S)$ state from a data sample of $4.7 \times 10^6\,Υ(3S)$ decays collected with the CLEO-III detector, and a measurement of the $η^{\prime}$ production spectrum using $1.9 \times 10^6\,Υ(1S)$ decays collected with the CLEO-II detector are described.6 pages, 8 figures. To appear in proceedings XXXVIIIth Rencontres de Moriond: QCD and High Energy Interactions, Les Arcs, France, March 2003High Energy Physics - Experimenttext