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Title: Multiparticle production and thermalization in high-energy QCD

Abstract

We argue that multiparticle production in high energy hadron and nuclear collisions can be considered as proceeding through the production of gluons in the background classical field. In this approach we derive the gluon spectrum immediately after the collision and find that at high energies it is parametrically enhanced by ln(1/x) with respect to the quasiclassical result (x is the Bjorken variable). We show that the produced gluon spectrum becomes thermal (in three dimensions) with an effective temperature determined by the saturation momentum Q{sub s},T=cQ{sub s}/2{pi} during the time {approx}1/T; we estimate c={radical}(2{pi})/2{approx_equal}1.2. Although this result by itself does not imply that the gluon spectrum will remain thermal at later times, it has an interesting applications to heavy ion collisions. In particular, we discuss the possibility of Bose-Einstein condensation of the produced gluon pairs and estimate the viscosity of the produced gluon system.

Authors:
 [1];  [2];  [3];  [4]
  1. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
  2. HEP Department, School of Physics, Raymond and Beverly Sackler Faculty of Exact Science, Tel Aviv University, Tel Aviv 69978 (Israel)
  3. Department of Physics and Astronomy, Iowa State University, Iowa 50011 (United States)
  4. (United States)
Publication Date:
OSTI Identifier:
20995222
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevC.75.044903; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BOSE-EINSTEIN CONDENSATION; COLLISIONS; GLUONS; HADRONS; HEAVY ION REACTIONS; QUANTUM CHROMODYNAMICS; S QUARKS; SATURATION; SPECTRA; THERMALIZATION

Citation Formats

Kharzeev, Dmitri, Levin, Eugene, Tuchin, Kirill, and RIKEN BNL Research Center, Upton, New York 11973-5000. Multiparticle production and thermalization in high-energy QCD. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.044903.
Kharzeev, Dmitri, Levin, Eugene, Tuchin, Kirill, & RIKEN BNL Research Center, Upton, New York 11973-5000. Multiparticle production and thermalization in high-energy QCD. United States. doi:10.1103/PHYSREVC.75.044903.
Kharzeev, Dmitri, Levin, Eugene, Tuchin, Kirill, and RIKEN BNL Research Center, Upton, New York 11973-5000. Sun . "Multiparticle production and thermalization in high-energy QCD". United States. doi:10.1103/PHYSREVC.75.044903.
@article{osti_20995222,
title = {Multiparticle production and thermalization in high-energy QCD},
author = {Kharzeev, Dmitri and Levin, Eugene and Tuchin, Kirill and RIKEN BNL Research Center, Upton, New York 11973-5000},
abstractNote = {We argue that multiparticle production in high energy hadron and nuclear collisions can be considered as proceeding through the production of gluons in the background classical field. In this approach we derive the gluon spectrum immediately after the collision and find that at high energies it is parametrically enhanced by ln(1/x) with respect to the quasiclassical result (x is the Bjorken variable). We show that the produced gluon spectrum becomes thermal (in three dimensions) with an effective temperature determined by the saturation momentum Q{sub s},T=cQ{sub s}/2{pi} during the time {approx}1/T; we estimate c={radical}(2{pi})/2{approx_equal}1.2. Although this result by itself does not imply that the gluon spectrum will remain thermal at later times, it has an interesting applications to heavy ion collisions. In particular, we discuss the possibility of Bose-Einstein condensation of the produced gluon pairs and estimate the viscosity of the produced gluon system.},
doi = {10.1103/PHYSREVC.75.044903},
journal = {Physical Review. C, Nuclear Physics},
number = 4,
volume = 75,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}