2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40213The net-baryon density at midrapidity is proposed as an order parameter in the search for the QCD critical point in heavy ion collisions. As a function of the initial energy and the total number of participants, this quantity obeys a scaling law, dictated by the critical exponents of the appropriate universality class. The corresponding scaling variable specifies the proximity of a given experiment to the critical point. Within this framework, measurements at the SPS are discussed and predictions for RHIC and LHC are extracted.10 pages, 4 figures, some corrections have been made and a figure has been addedHigh Energy Physics - Phenomenologytext