2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41089The aim of high energy nuclear collisions is to study the transition from hadronic matter to a plasma of deconfined quarks and gluons. I review the basic questions of this search and summarize recent theoretical developments in the field.11 pages, 9 figuresHigh Energy Physics - Phenomenologytext