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Charged meson rapidity distributions in central Au + Au collisions at √sNN = 200 GeV

  • I. G. Bearden*
  • , D. Beavis
  • , C. Besliu
  • , B. Budick
  • , H. Bøggild
  • , C. Chasman
  • , C. H. Christensen
  • , P. Christiansen
  • , J. Cibor
  • , R. Debbe
  • , E. Enger
  • , J. J. Gaardhøje
  • , M. Germinario
  • , K. Hagel
  • , O. Hansen
  • , A. Holm
  • , A. K. Holme
  • , H. Ito
  • , A. Jipa
  • , F. Jundt
  • J. I. Jørdre, C. E. Jørgensen, R. Karabowicz, E. J. Kim, T. Kozik, T. M. Larsen, J. H. Lee, Y. K. Lee, G. Løvhøiden, Z. Majka, A. Makeev, M. Mikelsen, M. Murray, J. Natowitz, B. S. Nielsen, J. Norris, K. Olchanski, D. Ouerdane, R. Planeta, F. Rami, C. Ristea, D. Röhrich, B. H. Samset, D. Sandberg, S. J. Sanders, R. A. Sheetz, P. Staszel, T. S. Tveter, F. Videbæk, R. Wada, Z. Yin, I. S. Zgura
*Corresponding author for this work
  • University of Copenhagen
  • Brookhaven National Laboratory
  • University of Bucharest
  • New York University
  • Polish Academy of Sciences
  • University of Oslo
  • Texas A&M University
  • University of Kansas
  • Université de Strasbourg
  • University of Bergen
  • Jagiellonian University in Kraków
  • Johns Hopkins University

Research output: Contribution to journalJournal articlepeer-review

Abstract

We have measured rapidity densities dN/dy of π± and K± over a broad rapidity range (- 0.1 < y < 3.5) for central Au + Au collisions at √sNN = 200 GeV. These data have significant implications for the chemistry and dynamics of the dense system that is initially created in the collisions. The full phase-space yields are 1660 ± 15 ± 133 (π+), 1683 ± 16 ± 135 (π-), 286 ± 5 ± 23 (K+), and 242 ± 4 ± 19 (K-). The systematics of the strange to nonstrange meson ratios are found to track the variation of the baryochemical potential with rapidity and energy. Landau-Carruthers hydrodynamics is found to describe the bulk transport of the pions in the longitudinal direction.

Original languageEnglish
Article number162301
JournalPhysical Review Letters
Volume94
Issue number16
DOIs
StatePublished - 2005.04.29

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