Energy and system size dependence of chemical freeze-out in relativistic nuclear collisions

By F. Becattini, J. Manninen, M. Gazdzicki. 2005

314 citations recorded by the source corpus.

We present a detailed study of chemical freeze-out in p-p, C-C, Si-Si, and Pb-Pb collisions at beam momenta of 158A GeV as well as Pb-Pb collisions at beam momenta of 20A, 30A, 40A, and 80A GeV. By analyzing hadronic multiplicities within the statistical hadronization model, we studied the parameters of the source as a function of the number of participating nucleons and the beam energy. We observe a nice smooth behavior of temperature, baryon chemical potential, and strangeness under-saturation parameter as a function of energy and nucleus size. Interpolating formulas are provided which allow us to predict the chemical freeze-out parameters in central collisions at center-of-mass energies {radical}(s){sub NN} > or approx. 4.5 GeV and for any colliding ions. Specific discrepancies between data and the model emerge in particle ratios in Pb-Pb collisions at beam energies between 20A and 40A GeV which cannot be accounted for in the considered model schemes.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/01c1088654964b446c43a06ee07ee1dc5d0ef13f

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1. T. Hatsuda
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Citations in the corpus

• The phase diagram of dense QCD (2010, background): “model assumes a thermally equilibrated gas of non-interacting mesons, baryons and resonances for a given T and μB [52, 53, 54].”
• The QCD phase diagram from analytic continuation (2015, unknown): “[57–63].”
• Properties of hot and dense matter from relativistic heavy ion collisions (2015, unknown): “in [112, 113, 114].”