HIPSTARS 2022 - Workshop on Heavy Ion Physics and Compact Stars

Dynamics of the QGP phase at finite baryon density

25 Oct 2022, 10:00

25m

Talk Contribution talks

Speaker

Olga Soloveva (Goethe University Frankfurt)

Description

We present 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 ${\mu }_B$ within a kinetic approach. We will explore first 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) [1] and dynamical quasiparticle model with the CEP (DQPM-CP) [2], and compare the results.
Furthermore, out-of equilibrium properties of the QGP medium and in particular, the effect of a ${\mu }_B$ - dependence of thermodynamic and transport properties of the QGP are studied within the Parton-Hadron-String-Dynamics (PHSD) transport approach [3,4].
The PHSD covers the full evolution of the system during HICs, including the partonic phase as well as the phase transition between the hadronic and partonic phases, where the microscopic properties of quarks and gluons are described by the DQPM.
The DQPM interprets the EoS in terms of dynamical degrees of freedom and allows evaluating the cross sections of the corresponding elastic and inelastic reactions, which are essential for the transport evolution.
The microscopic properties of partonic quasiparticles and their differential cross sections
depend not only on the temperature $T$ but also on the chemical potential ${\mu }_B$ explicitly in these studies.

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 ${\mu }_B$ - dependence of QGP interactions.

[1] O. Soloveva, D. Fuseau, J. Aichelin and E. Bratkovskaya,
Phys. Rev. C 103 (2021) no.5, 054901

[2] O. Soloveva, J. Aichelin and E. Bratkovskaya,
Phys. Rev. D 105 (2022) no.5, 054011

[3] W. Cassing and E.L. Bratkovskaya,
Nucl. Phys. A 831 (2009), 215-242

[4] P. Moreau, O. Soloveva, L. Oliva, T. Song, W. Cassing and E. Bratkovskaya,
Phys. Rev. C 100 (2019) no.1, 014911

Presentation materials

1_25oct_Soloveva_Olga_HIPSTARS.pdf