Hydrodynamics with a chiral hadronic equation of state including quark degrees of freedom

2009/05/31 by Jan Steinheimer, J. Steinheimer, Verônica Dexheimer +8
Physics and Astronomy · #Deconfinement #Equation of state #Hadron #High-Energy Particle Collisions Research #Lattice (music) #Nuclear physics #Observable #Particle physics #Particle physics theoretical and experimental studies #Phase transition #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Quark–gluon plasma #Resonance (particle physics) #Thermodynamics #hep-ph

paper · pdf · doi:10.1103/physrevc.81.044913

published as Phys.Rev.C81:044913,2010 · Published version

openalex publication_date 2010/04/29 · arxiv created 2010/04/30 · arxiv updated 2014/11/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate the influence of a deconfinement phase transition on the dynamics of hot and dense nuclear matter. To this aim a hybrid model with an intermediate hydrodynamic stage for the hot and dense phase of the system is employed for collisions of Pb+Pb/Au+Au at beam energies of E_lab=2--160 A GeV, while initial and final interactions are performed by a microscopic transport approach (UrQMD). In the hydrodynamic stage an equation of state that incorporates a critical end point in line with lattice data is used. It follows from coupling the Polyakov loop (as an order parameter for deconfinement) to a chiral hadronic SU(3)_f model. In this configuration the equation of state describes chiral restoration as well as the deconfinement phase transition. We compare the results from this new equation of state to results obtained, by applying a hadron resonance gas equation of state, focusing on bulk observables deemed to be sensitive to the phase transition to a quark-gluon plasma.

Citations

• Baryon-Strangeness Correlations: A Diagnostic of Strongly Interacting Matter
• Chiral effective model with the Polyakov loop
• Relativistic hydrodynamics for heavy-ion collisions. I. General aspects and expansion into vacuum
• Review of results from the NA49 Collaboration
• Critical point of QCD at finite T and , lattice results for physical quark masses
• Energy dependence of Λ and Ξ production in centralPb+Pbcollisions at20A,30A,40A,80A, and 158AGeV measured at the CERN Super Proton Synchrotron
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Event-by-event fluctuations in heavy ion collisions and the QCD critical point
• Fluctuations of the Initial Conditions and the Continuous Emission in the Hydrodynamical Description of Two-Pion Interferometry
• Causal viscous hydrodynamics for central heavy-ion collisions
• Space-time evolution of bulk QCD matter
• Pion and kaon production in centralPb+Pbcollisions at20Aand30AGeV: Evidence for the onset of deconfinement
• Report from NA49
• Microscopic models for ultrarelativistic heavy ion collisions
• New forms of QCD matter discovered at RHIC
• Near-Threshold Production of the MultistrangeΞ−Hyperon
• Hadronic freeze-out following a first order hadronization phase transition in ultrarelativistic heavy-ion collisions
• Polyakov loop, diquarks, and the two-flavor phase diagram
• Dissipation and Elliptic Flow at Relativistic Energies
• Charged pion production in2Ato8A<mml:mspace width="0.3em"/>GeVcentralAu+AuCollisions
• Collective flow signals the quark–gluon plasma