The role of the gluonic gg ↔ ggg interactions in early thermalization in ultrarelativistic heavy-ion collisions
نویسندگان
چکیده
We “quantify” the role of elastic as well as inelastic gg ↔ ggg pQCD processes in kinetic equilibration within a pQCD inspired parton cascade. The contributions of different processes to kinetic equilibration are manifested by the transport collision rates. We find that in a central Au+Au collision at RHIC energy pQCD Bremstrahlung processes are much more efficient for momentum isotropization compared to elastic scatterings. For the parameters chosen the ratio of their transport collision rates amounts to 5 : 1. PACS. 05.60.-k Transport processes – 25.75.-q Relativistic heavy-ion collisions – 24.10.Lx Monte Carlo simulations
منابع مشابه
ar X iv : h ep - p h / 05 09 32 4 v 1 2 8 Se p 20 05 Thermalization of gluons at RHIC including gg ↔ ggg interactions in a parton cascade
Employing a newly developed pQCD inspired parton cascade we simulate the space time evolution of gluons which are produced initially in a heavy ion collision at RHIC energy. The inelastic gg ↔ ggg interactions are for the first time implemented obeying full detailed balance. The numerical results show that thermalization of gluons is mainly driven by the inelastic gluonic interactions and reach...
متن کاملParton Equilibration in Ultrarelativistic Heavy Ion Collisions
Medium effects which include color screening and Landau-Pomeranchuk-Migdal suppression of induced radiation are discussed in connection with the equilibration of dense partonic system in ultrarelativistic heavy ion collisions. Taking into account of these medium effects, the equilibration rate for a gluonic gas are derived and the consequences are discussed.
متن کاملParton Chemistry and Non-Equilibrium HTL Resummation
A partonic reball, possibly created in ultrarelativistic heavy ion collisions, will not be in equilibrium at least in its early stage. However, as indicated by transport models [1], thermalization might be achieved quickly. A complete chemical equilibration of the quarks and gluons, on the other hand, may never take place. The chemical evolution of the reball can be described by means of rate e...
متن کاملPre-thermalization Dynamics: Initial Conditions for Qgp at the Lhc and Rhic from Perturbative Qcd
I discuss how the initial conditions for QGP-production in ultrarelativistic heavy ion collisions at the LHC and RHIC can be computed from perturbative QCD.
متن کاملHeavy Quarks in the Quark-gluon Plasma
Heavy-flavor particles are believed to provide valuable probes of the medium produced in ultrarelativistic collisions of heavy nuclei. In this article we review recent progress in our understanding of the interactions of charm and bottom quarks in the Quark-Gluon Plasma (QGP). For individual heavy quarks, we focus on elastic interactions for which the large quark mass enables a Brownian motion ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007