2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/108746We discuss the spectral analysis of quarkonium states in a hot medium of deconfined quarks and gluons, and we show that such an analysis provides a way to determine the thermal properties of the quark-gluon plasma.14 pages, 15 figures; presented at the meeting "A Sense of Beauty in Physics", honoring the 70th birthday of Adriano Di Giacomo; Pisa, Jan. 26 -27, 2006High Energy Physics - Phenomenologytext