2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43736Here we would like to review recent progress on the resummation on logarithms of $α_s$ in heavy quarkonium. We will mainly focus on the phenomenological relevance of these achievements. Determinations of the $η_b(1S)$ mass, $B_c(1S)$ hyperfine splitting, inclusive electromagnetic decays and implications for $t$-$\bar t$ production near threshold.8 pages, 8 figures, talk given at the 11th International Conference in Quantum ChromoDynamics (QCD04), Montpellier, France, 5-9 Jul 2004High Energy Physics - PhenomenologyHigh Energy Physics - ExperimentHigh Energy Physics - LatticeNuclear Theorytext