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Title: Space-time structure of initial parton production in ultrarelativistic heavy ion collisions

Abstract

The space and time evolution of initial parton production in ultrarelativistic heavy ion collisions is investigated within the framework of perturbative QCD which includes both initial and final state radiations. The uncertainty principle is used to relate the lifetime of a radiating parton to its virtuality and momentum. The interaction time of each hard or semihard parton scattering is also taken into account. For central Au+Au collisions at [radical][ital s] =200 GeV, most of the partons are found to be produced within 0.5 fm/[ital c] after the total overlap of the two colliding nuclei. The local momentum distribution is approximately isotropic at that time. The implication on how to treat correctly the secondary scattering in an ultimate parton cascading model is also discussed.

Authors:
 [1];  [2]
  1. (Nuclear Science Division, Mailstop 70A-3307, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States) Laboratory of High Energy Physics, P. O. Box 9, SF-00014 University of Helsinki, Helsinki (Finland))
  2. (Nuclear Science Division, Mailstop 70A-3307, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States))
Publication Date:
OSTI Identifier:
5338875
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Journal Article
Journal Name:
Physical Review, D (Particles Fields); (United States)
Additional Journal Information:
Journal Volume: 49:3; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; GOLD 197 TARGET; PARTICLE PRODUCTION; SPACE-TIME; PARTONS; GOLD 197 REACTIONS; HEAVY ION REACTIONS; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; CHARGED-PARTICLE REACTIONS; ELEMENTARY PARTICLES; FIELD THEORIES; NUCLEAR REACTIONS; POSTULATED PARTICLES; QUANTUM FIELD THEORY; TARGETS; 663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-); 662230 - Quantum Chromodynamics- (1992-); 663300 - Nuclear Reactions & Scattering, General- (1992-)

Citation Formats

Eskola, K.J., and Wang, X. Space-time structure of initial parton production in ultrarelativistic heavy ion collisions. United States: N. p., 1994. Web. doi:10.1103/PhysRevD.49.1284.
Eskola, K.J., & Wang, X. Space-time structure of initial parton production in ultrarelativistic heavy ion collisions. United States. doi:10.1103/PhysRevD.49.1284.
Eskola, K.J., and Wang, X. Tue . "Space-time structure of initial parton production in ultrarelativistic heavy ion collisions". United States. doi:10.1103/PhysRevD.49.1284.
@article{osti_5338875,
title = {Space-time structure of initial parton production in ultrarelativistic heavy ion collisions},
author = {Eskola, K.J. and Wang, X.},
abstractNote = {The space and time evolution of initial parton production in ultrarelativistic heavy ion collisions is investigated within the framework of perturbative QCD which includes both initial and final state radiations. The uncertainty principle is used to relate the lifetime of a radiating parton to its virtuality and momentum. The interaction time of each hard or semihard parton scattering is also taken into account. For central Au+Au collisions at [radical][ital s] =200 GeV, most of the partons are found to be produced within 0.5 fm/[ital c] after the total overlap of the two colliding nuclei. The local momentum distribution is approximately isotropic at that time. The implication on how to treat correctly the secondary scattering in an ultimate parton cascading model is also discussed.},
doi = {10.1103/PhysRevD.49.1284},
journal = {Physical Review, D (Particles Fields); (United States)},
issn = {0556-2821},
number = ,
volume = 49:3,
place = {United States},
year = {1994},
month = {2}
}