Abstract
In the framework of relativistic quantum molecular dynamics we analyse pion chemical potentials in the hadron system produced in central heavy-ion collisions at the bombarding energiesElab/A=(1–2) GeV/nucl. We find that the equilibrium relations hold for chemical potentials of π−, of π0, of π+ and pion energy spectra reach local thermal equilibrium. However, there is no chemical equilibrium. The pion chemical potentials are very large and decrease during the expansion stage.
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