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Title: Strangeness chemical equilibration in a quark-gluon plasma

Abstract

We study, in the dynamically evolving quark-gluon plasma (QGP) fireball formed in relativistic heavy ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC) and CERN Large Hadron Collider (LHC), the growth of strangeness yield toward and beyond the chemical equilibrium. We account for the contribution of the direct strangeness production and evaluate the thermal-QCD strangeness production mechanisms. The specific yield of strangeness per entropy, s/S, is the primary target variable. We explore the effect of collision impact parameter, i.e., fireball size, on kinetic strangeness chemical equilibration in QGP. Insights gained in studying the RHIC data with regard to the dynamics of the fireball are applied to the study of strangeness production at the LHC. We use these results and consider the strange hadron relative particle yields at RHIC and LHC in a systematic fashion. We consider both the dependence on s/S and the direct dependence on the participant number.

Authors:
;  [1];  [2]
  1. Laboratoire de Physique Theorique et Hautes Energies, Universite Paris 7, 2 place Jussieu, F-75251 Cedex 05 (France)
  2. (United States)
Publication Date:
OSTI Identifier:
20990968
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevC.75.014905; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BROOKHAVEN RHIC; CERN LHC; ENTROPY; HEAVY ION REACTIONS; QUANTUM CHROMODYNAMICS; QUARK MATTER; STRANGENESS

Citation Formats

Letessier, Jean, Rafelski, Johann, and Department of Physics, University of Arizona, Tucson, Arizona 85721. Strangeness chemical equilibration in a quark-gluon plasma. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.014905.
Letessier, Jean, Rafelski, Johann, & Department of Physics, University of Arizona, Tucson, Arizona 85721. Strangeness chemical equilibration in a quark-gluon plasma. United States. doi:10.1103/PHYSREVC.75.014905.
Letessier, Jean, Rafelski, Johann, and Department of Physics, University of Arizona, Tucson, Arizona 85721. Mon . "Strangeness chemical equilibration in a quark-gluon plasma". United States. doi:10.1103/PHYSREVC.75.014905.
@article{osti_20990968,
title = {Strangeness chemical equilibration in a quark-gluon plasma},
author = {Letessier, Jean and Rafelski, Johann and Department of Physics, University of Arizona, Tucson, Arizona 85721},
abstractNote = {We study, in the dynamically evolving quark-gluon plasma (QGP) fireball formed in relativistic heavy ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC) and CERN Large Hadron Collider (LHC), the growth of strangeness yield toward and beyond the chemical equilibrium. We account for the contribution of the direct strangeness production and evaluate the thermal-QCD strangeness production mechanisms. The specific yield of strangeness per entropy, s/S, is the primary target variable. We explore the effect of collision impact parameter, i.e., fireball size, on kinetic strangeness chemical equilibration in QGP. Insights gained in studying the RHIC data with regard to the dynamics of the fireball are applied to the study of strangeness production at the LHC. We use these results and consider the strange hadron relative particle yields at RHIC and LHC in a systematic fashion. We consider both the dependence on s/S and the direct dependence on the participant number.},
doi = {10.1103/PHYSREVC.75.014905},
journal = {Physical Review. C, Nuclear Physics},
number = 1,
volume = 75,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}