  Recent studies based on non-perturbative lattice Monte-Carlo solutions of
Quantum Chromodynamics, the theory of strong interactions, demonstrated that at
high temperature there is a phase change from confined hadronic matter to a
deconfined quark-gluon plasma where quarks and gluons can travel distances
largely exceeding the size of hadrons. The phase structure of such strongly
interacting matter can be decoded via analysis of particle abundances in high
energy nuclear collisions within the framework of the statistical hadronization
approach. The results imply quark-hadron duality at and experimental
delineation of the location of the phase boundary of strongly interacting
matter.
