2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82405Relative hadron abundances from high-energy heavy-ion collisions reveal substantial inhomogeneities of temperature and baryon-chemical potential within the decoupling volume. The freeze-out volume is not perfectly "stirred", i.e. the concentrations of pions, kaons, (anti-) nucleons etc are inhomogeneous. Such inhomogeneities in the late stages of the hydrodynamic expansion might be traces of a first-order phase transition.Contribution to the GSI annual scientific report 2004Nuclear Theorytext