Journalartikel
Autorenliste: Xu, Z; Greiner, C
Jahr der Veröffentlichung: 2005
Zeitschrift: Physical Review C
Bandnummer: 71
Heftnummer: 6
ISSN: 0556-2813
eISSN: 1089-490X
Open Access Status: Green
DOI Link: https://doi.org/10.1103/PhysRevC.71.064901
Verlag: American Physical Society
Abstract:
We develop a new 3 + 1 dimensional Monte Carlo cascade solving the kinetic on-shell Boltzmann equations for partons including the inelastic gg <-> ggg pQCD processes. The back reaction channel is treated - for the first time - fully consistently within this scheme. An extended stochastic method is used to solve the collision integral. The frame dependence and convergency are studied for a fixed tube with thermal initial conditions. The detailed numerical analysis shows that the stochastic method is fully covariant and that convergency is achieved more efficiently than within a standard geometrical formulation of the collision term, especially for high gluon interaction rates. The cascade is then applied to simulate parton evolution and to investigate thermalization of gluons for a central Au+Au collision at RHIC energy. For this study the initial conditions are assumed to be generated by independent minijets with p(T)> p(0)=2 GeV. With that choice it is demonstrated that overall kinetic equilibration is driven mainly by the inelastic processes and is achieved on a scale of 1 fm/c. The further evolution of the expanding gluonic matter in the central region then shows almost an ideal hydrodynamical behavior. In addition, full chemical equilibration of the gluons follows on a longer time scale of about 3 fm/c.
Zitierstile
Harvard-Zitierstil: Xu, Z. and Greiner, C. (2005) Thermalization of gluons in ultrarelativistic heavy ion collisions by including three-body interactions in a parton cascade, Physical Review C, 71(6), Article 064901. https://doi.org/10.1103/PhysRevC.71.064901
APA-Zitierstil: Xu, Z., & Greiner, C. (2005). Thermalization of gluons in ultrarelativistic heavy ion collisions by including three-body interactions in a parton cascade. Physical Review C. 71(6), Article 064901. https://doi.org/10.1103/PhysRevC.71.064901
Schlagwörter
CHEMICAL EQUILIBRATION; ELLIPTIC FLOW; entropy production; NUCLEAR COLLISIONS; PLUS AU COLLISIONS; QUARK; STRANGENESS PRODUCTION; TRANSVERSE ENERGIES
