Flavour and energy dependence of chemical freeze-out temperatures in relativistic heavy ion collisions from RHIC-BES to LHC energies

Abstract We present calculations of the chemical freeze-out temperature ( T ch ) based on particle yields from STAR and ALICE measured at collision energies ranging from s NN = 11.5 GeV to 5.02 TeV. Employing the Grand Canonical Ensemble approach using the Thermal-FIST Hadron Resonance Gas model package, we show evidence for a flavour-dependent chemical freeze-out in the crossover region of the QCD phase diagram. At a vanishing baryochemical potential, we calculate light and strange flavour freeze-out temperatures T L = 150.2 ± 2.6 MeV and T S = 165.1 ± 2.7 MeV, respectively.