Melting and freeze-out conditions of hadrons in a thermal medium
Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, 60438 Frankfurt am Main, Germany
2 Subatech, UMR 6457, IN2P3/CNRS, Université de Nantes, École de Mines de Nantes, 4 rue Alfred Kastler, 44307 Nantes, France
3 Institute for Theoretical Physics, Goethe University, Max-von-Laue-Str. 1, 60438 Frankfurt a.M., Germany
4 GSI Helmholtzzentrum für Schwerionenforschung, Planck-Str. 1, 64291 Darmstadt, Germany
5 Department of Physics, University of Bath, Claverton Down, Bath, United Kingdom
* Speaker, e-mail: firstname.lastname@example.org
Published online: 2 February 2018
We describe two independent frameworks which provide unambiguous determinations of the deconfinement and the decoupling conditions of a relativistic gas at finite temperature. First, we use the Polyakov-Nambu-Jona–Lasinio model to compute meson and baryon masses at finite temperature and determine their melting temperature as a function of their strangeness content. Second, we analyze a simple expanding gas within a Friedmann-Robertson-Walker metric, which admits a well-defined decoupling mechanism. We examine the decoupling time as a function of the particle mass and cross section. We find evidences of an inherent dependence of the hadronization and freeze-out conditions on flavor, and on mass and cross section, respectively.
© The Authors, published by EDP Sciences, 2018
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