Exploration of the phase diagram within a transport approach

¹ Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Center for Heavy Ion Physics, Campus Frankfurt, 60438 Frankfurt, Germany
² Institut fur Theoretische Physik, Johann Wolfgang Goethe-Universitat, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany
³ Department of Physics, Duke University, Durham, NC 27708, USA
⁴ Department of Physics and Astronomy “Ettore Majorana”, University of Catania, Via S. Sofia 64, 1-95123 Catania, Italy
⁵ INFN Sezione di Catania, Via S. Sofia 64, 1-95123 Catania, Italy
⁶ SUBATECH, University of Nantes, IMT Atlantique, IN2P3/CNRS 4 rue Alfred Kastler, 44307 Nantes cedex 3, France
⁷ Frankfurt Institute for Advanced Studies, Ruth-Moufang-Strasse 1, 60438 Frankfurt am Main, Germany
⁸ Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Moscow region, Russia
⁹ GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt, Germany

^* e-mail: soloveva@itp.uni-frankfurt.de

Published online: 1 March 2023

Abstract

We study equilibrium as well as out-of-equilibrium properties of the strongly interacting QGP medium under extreme conditions of high temperature T and high baryon densities or baryon chemical potentials μ_B within a kinetic approach. We present the thermodynamic and transport properties of the QGP close to equilibrium in the framework of effective models with N_f=3 active quark flavours such as the Polyakov extended Nambu-Jona Lasinio (PNJL) and dynamical quasiparticle model with the CEP (DQPM-CP). Considering the transport coefficients and the EoS of the QGP phase, we compare our results with various results from the literature. Furthermore, out-of equilibrium properties of the QGP medium and in particular, the effect of a μ_B- dependence of thermodynamic and transport properties of the QGP are studied within the Parton-Hadron-String-Dynamics (PHSD) transport approach, which covers the full evolution of the system during HICs. We find that bulk observables and flow coefficients for strange hadrons as well as for antiprotons are more sensitive to the properties of the QGP, in particular to the μ_B - dependence of the QGP interactions.