Pierre Moreau

Chiral symmetry restoration in heavy-ion collisions at intermediate energies

We study the effect of the chiral symmetry restoration (CSR) on heavy-ion collisions observables in the energy range

Traces of nonequilibrium dynamics in relativistic heavy-ion collisions

\sqrt{s_{NN}}

Traces of non-equilibrium dynamics in relativistic heavy-ion collisions

=3-20 GeV within the Parton-Hadron-String Dynamics (PHSD) transport approach. The PHSD includes the deconfinement phase transition as well as essential aspects of CSR in the dense and hot hadronic medium, which are incorporated in the Schwinger mechanism for the hadronic particle production. We adopt different parametrizations of the nuclear equation of state from the non-linear

Hadron Production within PHSD

\sigma-\omega

(Anti-)strangeness production in heavy-ion collisions

model, which enter in the computation of the quark scalar density for the CSR mechanism, in order to estimate the uncertainty in our calculations.

Examinations of the early degrees of freedom in ultrarelativistic nucleus-nucleus collisions

The impact of nonequilibrium effects on the dynamics of heavy-ion collisions is investigated by comparing a nonequilibrium transport approach, the Parton-Hadron-String-Dynamics (PHSD), to a 2D+1 viscous hydrodynamical model, which is based on the assumption of local equilibrium and conservation laws. Starting the hydrodynamical model from the same nonequilibrium initial condition as in the PHSD, using an equivalent lQCD equation of state (EoS), the same transport coefficients, i.e., shear viscosity η and the bulk viscosity ζ in the hydrodynamical model, we compare the time evolution of the system in terms of energy density, Fourier transformed energy density, spatial and momentum eccentricities, and ellipticity to quantify the traces of nonequilibrium phenomena. In addition, we also investigate the role of initial pre-equilibrium flow on the hydrodynamical evolution and demonstrate its importance for final state observables. We find that because of nonequilibrium effects, the event-by-event transport calculations show large fluctuations in the collective properties, while ensemble averaged observables are close to the hydrodynamical results.

Evidence for chiral symmetry restoration in heavy-ion collisions

The impact of non-equilibrium effects on the dynamics of heavy-ion collisions is investigated by comparing a non-equilibrium transport approach, the Parton-Hadron-String-Dynamics (PHSD), to a 2D+1 viscous hydrodynamical model, which is based on the assumption of local equilibrium and conservation laws. Starting the hydrodynamical model from the same non-equilibrium initial condition as in the PHSD, using an equivalent lQCD Equation-of-State (EoS), the same transport coefficients, i.e. shear viscosity

(Anti-)strangeness in heavy-ion collisions

\eta

Chiral symmetry restoration versus deconfinement in heavy-ion collisions at high baryon density

and the bulk viscosity

Observables and open problems for NICA

\zeta