QCD Matter Thermalization at RHIC and LHC

Abstract

Employing the perturbative QCD inspired parton cascade, we investigate kinetic and chemical equilibration of the partonic matter created in central heavy ion collisions at RHIC and LHC energies. Two types of initial conditions are chosen. One is generated by the model of wounded nucleons using the PYTHIA event generator and Glauber geometry. Another is considered as a color glass condensate. We show that kinetic equilibration is almost independent on the chosen initial conditions, whereas there is a sensitive dependence for chemical equilibration. The time scale of thermalization lies between 1 and 1.5 fm/c. The final parton transverse energy obtained from BAMPS calculations is compared with the RHIC data and is estimated for the LHC energy.

8 pages, 10 figures, plenary talk at International Conference on Strangeness in Quark Matter 2008, Beijing, China, October 6-10, 2008

References in corpus (14)

• PYTHIA 6.4 Physics and Manual
• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• Conformal Relativistic Viscous Hydrodynamics: Applications to RHIC results at sqrt(s_NN) = 200 GeV
• Causal viscous hydrodynamics in 2+1 dimensions for relativistic heavy-ion collisions
• Simulating elliptic flow with viscous hydrodynamics
• Scaling properties of azimuthal anisotropy in Au+Au and Cu+Cu collisions at sqrt(s_NN) = 200 GeV
• Perturbative QCD Calculations of Elliptic Flow and Shear Viscosity in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV
• The eccentricity in heavy-ion collisions from Color Glass Condensate initial conditions
• Shear Viscosity in a Gluon Gas
• Transport rates and momentum isotropization of gluon matter in ultrarelativistic heavy-ion collisions
• Elliptic flow of gluon matter in ultrarelativistic heavy-ion collisions
• A model of the effect of collisions on QCD plasma instabilities
• Thermalization of a color glass condensate and review of the "Bottom-Up" scenario
• Parton Collectivity from RHIC to the LHC

Cited by in corpus (6)

• High-pT pi^zero Production with Respect to the Reaction Plane in Au + Au Collisions at sqrt(s_NN) = 200 GeV
• Heavy quark production at RHIC and LHC within a partonic transport model
• Kaon and pion femtoscopy at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC) in a hydrokinetic model
• Matching of nonthermal initial conditions and hydrodynamic stage in ultrarelativistic heavy-ion collisions
• Entanglement of scales as a possible mechanism for decoherence and thermalization in relativistic heavy ion collisions
• Thermal nature of charmonium transverse momentum spectra from Au-Au collisions at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC)