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Title: Thermalization in ultrarelativistic nuclear collisions. I. Parton kinetics and quark-gluon plasma formation

Abstract

A relativistic kinetic formulation of the time evolution of parton distributions during the early pre- equilibrium stage of nucleus-nucleus collisions at the BNL Relativistic Heavy Ion Collider (RHIC) and CERN Large Hadron Collider (LHC) is presented to study the microscopic dynamics and equilibration of the system. The nuclear collision is described as a sequence of multiple hard and soft parton-parton collisions and associated parton emission and absorption processes. Important aspects for the space-time evolution of the partonic system are the balance between emissive and absorptive processes, dilated formation of gluon radiation, and the effects of soft gluon interference. The time evolution of central [sup 32]S+[sup 32]S and [sup 197]Au+[sup 197]Au collisions at RHIC ([radical][ital s] =200[ital A] GeV) is studied in complete phase space and the approach to equilibrium is investigated. The results obtained imply the formation of hot quark-gluon plasmas in these collisions with estimated equilibriation times, temperatures, and energy densities of [tau][sub eq][congruent]1.2 (1.8) fm/[ital c], [ital T][congruent]290 (325) MeV, and [epsilon][congruent]17 (31) GeV/fm[sup 3] for [sup 32]S+[sup 32]S ([sup 197]Au+[sup 197]Au). The consequences of such rather high temperatures and energy densities should be clear quark-gluon plasma signatures, observable in the production of charm, strangeness, direct photons, andmore » dileptons.« less

Authors:
 [1]
  1. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
Publication Date:
OSTI Identifier:
6967088
DOE Contract Number:  
FG02-87ER40328
Resource Type:
Journal Article
Journal Name:
Physical Review, D (Particles Fields); (United States)
Additional Journal Information:
Journal Volume: 46:11; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HEAVY ION REACTIONS; QUARK MATTER; ENERGY DENSITY; GOLD 197 REACTIONS; GOLD 197 TARGET; MANY-DIMENSIONAL CALCULATIONS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE KINEMATICS; PARTICLE PRODUCTION; PARTONS; PHASE SPACE; PRECOMPOUND-NUCLEUS EMISSION; QUANTUM CHROMODYNAMICS; SPACE-TIME; STRANGENESS; SULFUR 32 REACTIONS; SULFUR 32 TARGET; TEV RANGE; BARYON-BARYON INTERACTIONS; CHARGED-PARTICLE REACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FIELD THEORIES; HADRON-HADRON INTERACTIONS; INTERACTIONS; MATHEMATICAL SPACE; MATTER; NUCLEAR REACTIONS; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; POSTULATED PARTICLES; QUANTUM FIELD THEORY; SPACE; TARGETS; 662340* - Hadron Interactions- (1992-); 662230 - Quantum Chromodynamics- (1992-)

Citation Formats

Geiger, K. Thermalization in ultrarelativistic nuclear collisions. I. Parton kinetics and quark-gluon plasma formation. United States: N. p., 1992. Web. doi:10.1103/PhysRevD.46.4965.
Geiger, K. Thermalization in ultrarelativistic nuclear collisions. I. Parton kinetics and quark-gluon plasma formation. United States. doi:10.1103/PhysRevD.46.4965.
Geiger, K. Tue . "Thermalization in ultrarelativistic nuclear collisions. I. Parton kinetics and quark-gluon plasma formation". United States. doi:10.1103/PhysRevD.46.4965.
@article{osti_6967088,
title = {Thermalization in ultrarelativistic nuclear collisions. I. Parton kinetics and quark-gluon plasma formation},
author = {Geiger, K},
abstractNote = {A relativistic kinetic formulation of the time evolution of parton distributions during the early pre- equilibrium stage of nucleus-nucleus collisions at the BNL Relativistic Heavy Ion Collider (RHIC) and CERN Large Hadron Collider (LHC) is presented to study the microscopic dynamics and equilibration of the system. The nuclear collision is described as a sequence of multiple hard and soft parton-parton collisions and associated parton emission and absorption processes. Important aspects for the space-time evolution of the partonic system are the balance between emissive and absorptive processes, dilated formation of gluon radiation, and the effects of soft gluon interference. The time evolution of central [sup 32]S+[sup 32]S and [sup 197]Au+[sup 197]Au collisions at RHIC ([radical][ital s] =200[ital A] GeV) is studied in complete phase space and the approach to equilibrium is investigated. The results obtained imply the formation of hot quark-gluon plasmas in these collisions with estimated equilibriation times, temperatures, and energy densities of [tau][sub eq][congruent]1.2 (1.8) fm/[ital c], [ital T][congruent]290 (325) MeV, and [epsilon][congruent]17 (31) GeV/fm[sup 3] for [sup 32]S+[sup 32]S ([sup 197]Au+[sup 197]Au). The consequences of such rather high temperatures and energy densities should be clear quark-gluon plasma signatures, observable in the production of charm, strangeness, direct photons, and dileptons.},
doi = {10.1103/PhysRevD.46.4965},
journal = {Physical Review, D (Particles Fields); (United States)},
issn = {0556-2821},
number = ,
volume = 46:11,
place = {United States},
year = {1992},
month = {12}
}