Conveners
:: Early times
- Jakub Cimerman (Matej Bel University, Slovakia)
:: High density
- Clemens Werthmann (University of Wrocław, Poland)
:: Heavy quarks 2
- Bojana Ilic (Institute of Physics Belgrade, Serbia)
Presentation Materials
We discuss two topics in hydrodynamic description of QGP fluids in high-energy nuclear collisions. We first constrain the initial conditions in the Bjorken expansion model by considering causality. When the system is far away from local equilibrium, the relativistic hydrodynamic equations tend to violate the causality. Within the conformal fluids in one-dimensionally expanding system, we find...
We simulate the space-time dynamics of high-energy collisions based on a microscopic kinetic description in the conformal relaxation time approximation, in order to determine the range of applicability of an effective description in relativistic viscous hydrodynamics [1,2]. We find that hydrodynamics provides a quantitatively accurate description of collective flow when the average inverse...
Properties of quark gluon plasma (QGP) have been studied in high-energy nuclear collisions. Since it is difficult to describe the dynamical phenomena by first-principle calculations, an approach via phenomenological models is indispensable to scrutinize the QGP properties through experimental data. We have developed a Monte Carlo event generator based on the hydrodynamic picture of the QGP,...
Results obtained from dilepton measurements over the past 25 years at energies from SPS energies up to RHIC and LHC energies will be reviewed. The motivation for extending these measurements to lower energies will be discussed with emphasis on the onset of the deconfinement phase transition, the onset of chiral symmetry restoration and the search for a first order phase transition. The current...
We investigate the fluctuations of the net-baryon number density in dense hadronic matter. Chiral dynamics is modeled via the parity doublet Lagrangian, and the mean-field approximation is employed to account for chiral criticality. We focus on the qualitative properties and systematics of the second-order susceptibility of the net-baryon number density for individual positive- and...
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 μB within a kinetic approach. We present the thermodynamic and transport properties of the QGP close to equilibrium in the framework of effective models with Nf=3 active quark flavors such as...
The hydrodynamic modelling of heavy-ion collisions at energies from few to tens of GeV per NN pair brings new challenges as compared to simulations at top RHIC or LHC energies. The contraction of the incoming nuclei is much weaker resulting in a long inter-penetration phase and a more complex initial-state geometry. Conventional hydrodynamic models, where the fluid phase starts at a fixed...
We present the first microscopic model, which allows to describe the formation of charmonia in ultrarelativistic heavy ion collisions. We follow the heavy quarks from their initial production in hard collisions, followed by their passage through the quark gluon plasma where the heavy quarks interact with the plasma constituents and among themselves with a potential obtained by lattice gauge...
The global picture of quarkonia production in heavy ions collisions has recently reached some good consensus in the community.
However, before turning it into a precision tool to better characterize QGP, some theoretical challenges still need to be met.
In this talk, I will review some of the recent progress achieved for the description of quarkonia production, focusing on both fully quantum...
The behavior of quarkonia and open-heavy flavour hadrons in hadronic collisions provide a unique testing ground for understanding quantum chromodynamics (QCD). Although there has been significant progress, our understanding of hadronic collisions has been challenged by the observation of intriguing effects in high-multiplicity proton-proton and proton-Pb collisions, such as the discovery of...
The heavy quark momentum diffusion coefficient (𝜅) is one of the most important ingredients for the Langevin description of the heavy quark dynamics. In the temperature regime relevant for the heavy ion collision phenomenology, there exists a substantial difference between the lattice estimations of 𝜅 and the corresponding leading order (LO) result from the hard thermal loop (HTL) perturbation...
