Toward parton equilibration with improved parton interaction matrix elements

Abstract

The Quark-Gluon Plasma can be produced in high energy heavy ion collisions and how it equilibrates is important for the extraction of the properties of strongly interacting matter. A radiative transport model can be used to reveal interesting characteristics of Quark-Gluon Plasma thermalization. For example, screened parton interactions always lead to partial pressure isotropization. Systems with different initial pressure anisotropies evolve toward the same asymptotic evolution. In particular, radiative processes are crucial for the chemical equilibration of the system. Matrix elements under the soft and collinear approximation for these processes, as first derived by Gunion and Bertsch, are widely used. A different approach is to start with the exact matrix elements for the two to three and its inverse processes. General features of this approach will be reviewed and the results will be compared with the Gunion-Bertsch results. We will comment on the possible implications of the exact matrix element approach on Quark-Gluon Plasma thermalization.

Presented at the 11th International Conference on Nucleus-Nucleus Collisions (NN2012), San Antonio, Texas, USA, 27 May-1 June 2012

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Cited by in corpus (6)

• Elliptic Flow from Non-equilibrium Initial Condition with a Saturation Scale
• Radiative parton processes in perturbative QCD - an improved version of the Gunion and Bertsch cross section from comparisons to the exact result
• Glasma Evolution and Bose-Einstein Condensation with Elastic and Inelastic Collisions
• Kinetic evolution of the glasma and thermalization in heavy ion collisions
• Equilibrium and equilibration in a gluon plasma with improved matrix elements
• Work distribution of an expanding gas and transverse energy production in relativistic heavy ion collisions