Abstract
The measured particle ratios in central heavy-ion collisions are investigated within a chemical and thermal equilibrium chiral SU(3) σ−ω approach. Contrary to the commonly adopted non-interacting gas calculations, the chiral SU(3) model predicts modified effective hadron masses and effective chemical potentials in the medium and a transition to a chirally restored phase at high temperatures or chemical potentials. the influence of three different types of phase transitions is investigated. We show that the deduced freeze-out values considerably depend on the underlying model while the quality of the fit is approximately the same.
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Paech, K., Dumitru, A., Schaffner-Bielich, J. et al. Particle ratios from a chiral SU(3) model. Acta Phys. Hung. A 21, 151–156 (2004). https://doi.org/10.1556/APH.21.2004.2-4.9
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DOI: https://doi.org/10.1556/APH.21.2004.2-4.9