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Title: Particle number fluctuations in high-energy nucleus-nucleus collisions from microscopic transport approaches

Abstract

Event-by-event multiplicity fluctuations in nucleus-nucleus collisions are studied within the hadron-string dynamics (HSD) and ultra-relativistic quantum molecular dynamics (UrQMD) transport models. The scaled variances of negative, positive, and all charged hadrons in Pb+Pb at 158A GeV are analyzed in comparison to the data from the NA49 Collaboration. We find a dominant role of the fluctuations in the nucleon participant number for the final hadron multiplicity fluctuations. This fact can be used to check different scenarios of nucleus-nucleus collisions by measuring the final multiplicity fluctuations as a function of collision centrality. The analysis reveals surprising effects in the recent NA49 data which indicate a rather strong mixing of the projectile and target hadron production sources even in peripheral collisions.

Authors:
 [1];  [2]; ;  [3];  [1];  [4];  [5];  [3];  [4]
  1. Bogolyubov Institute for Theoretical Physics, Kiev (Ukraine)
  2. (Ukraine)
  3. Frankfurt Institute for Advanced Studies, Frankfurt (Germany)
  4. (Germany)
  5. Institut fuer Theoretische Physik, Johann Wolfgang Goethe Universitaet, Frankfurt (Germany)
Publication Date:
OSTI Identifier:
20771363
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.73.034902; (c) 2006 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; COMPARATIVE EVALUATIONS; FLUCTUATIONS; GEV RANGE; LEAD 208 REACTIONS; MOLECULAR DYNAMICS METHOD; MULTIPLICITY; NUCLEONS; PARTICLE PRODUCTION; PERIPHERAL COLLISIONS; RELATIVISTIC RANGE; TRANSPORT THEORY

Citation Formats

Konchakovski, V.P., Shevchenko National University, Kiev, Haussler, S., Bratkovskaya, E.L., Gorenstein, M.I., Frankfurt Institute for Advanced Studies, Frankfurt, Bleicher, M., Stoecker, H., and Institut fuer Theoretische Physik, Johann Wolfgang Goethe Universitaet, Frankfurt. Particle number fluctuations in high-energy nucleus-nucleus collisions from microscopic transport approaches. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.034902.
Konchakovski, V.P., Shevchenko National University, Kiev, Haussler, S., Bratkovskaya, E.L., Gorenstein, M.I., Frankfurt Institute for Advanced Studies, Frankfurt, Bleicher, M., Stoecker, H., & Institut fuer Theoretische Physik, Johann Wolfgang Goethe Universitaet, Frankfurt. Particle number fluctuations in high-energy nucleus-nucleus collisions from microscopic transport approaches. United States. doi:10.1103/PhysRevC.73.034902.
Konchakovski, V.P., Shevchenko National University, Kiev, Haussler, S., Bratkovskaya, E.L., Gorenstein, M.I., Frankfurt Institute for Advanced Studies, Frankfurt, Bleicher, M., Stoecker, H., and Institut fuer Theoretische Physik, Johann Wolfgang Goethe Universitaet, Frankfurt. Wed . "Particle number fluctuations in high-energy nucleus-nucleus collisions from microscopic transport approaches". United States. doi:10.1103/PhysRevC.73.034902.
@article{osti_20771363,
title = {Particle number fluctuations in high-energy nucleus-nucleus collisions from microscopic transport approaches},
author = {Konchakovski, V.P. and Shevchenko National University, Kiev and Haussler, S. and Bratkovskaya, E.L. and Gorenstein, M.I. and Frankfurt Institute for Advanced Studies, Frankfurt and Bleicher, M. and Stoecker, H. and Institut fuer Theoretische Physik, Johann Wolfgang Goethe Universitaet, Frankfurt},
abstractNote = {Event-by-event multiplicity fluctuations in nucleus-nucleus collisions are studied within the hadron-string dynamics (HSD) and ultra-relativistic quantum molecular dynamics (UrQMD) transport models. The scaled variances of negative, positive, and all charged hadrons in Pb+Pb at 158A GeV are analyzed in comparison to the data from the NA49 Collaboration. We find a dominant role of the fluctuations in the nucleon participant number for the final hadron multiplicity fluctuations. This fact can be used to check different scenarios of nucleus-nucleus collisions by measuring the final multiplicity fluctuations as a function of collision centrality. The analysis reveals surprising effects in the recent NA49 data which indicate a rather strong mixing of the projectile and target hadron production sources even in peripheral collisions.},
doi = {10.1103/PhysRevC.73.034902},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}