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Centrality dependence of charged-particle pseudorapidlty distributions from d + Au collisions at √SNN = 200 GeV

  • I. Arsene*
  • , 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
  • , H. Ito
  • , A. Jipa
  • , J. I. Jørdre
  • , F. Jundt
  • , C. E. Jørgensen
  • R. Karabowicz, E. J. Kim, T. Kozik, T. M. Larsen, J. H. Lee, Y. K. Lee, S. Lindal, R. Lystad, G. Løvhøiden, Z. Majka, A. Makeev, M. Mikelsen, M. Murray, J. Natowitz, B. Neumann, B. S. Nielsen, D. Ouerdane, R. Płaneta, F. Rami, C. Ristea, O. Rostea, 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 Bucharest
  • University of Copenhagen
  • Brookhaven National Laboratory
  • New York University
  • Polish Academy of Sciences
  • University of Oslo
  • Texas A&M University
  • University of Kansas
  • University of Bergen
  • Université de Strasbourg
  • Jagiellonian University in Kraków
  • Johns Hopkins University

Research output: Contribution to journalJournal articlepeer-review

Abstract

Charged-particle pseudorapidity densities are presented for the d + Au reaction at √SNN = 200 GeV with -4.2 ≤ η ≤ 4.2. The results, from the BRAHMS experiment at BNL Relativistic Heavy-Ion Collider, are shown for minimum-bias events and 0%-30%, 30%-60%, and 60%-80% centrality classes. Models incorporating both soft physics and hard, perturbative QCD-based scattering physics agree well with the experimental results. The data do not support predictions based on strong-coupling, semiclassical QCD. In the deuteron-fragmentation region the central 200 GeV data show behavior similar to full-overlap d + Au results at √SNN = 19.4 GeV.

Original languageEnglish
Article number032301
JournalPhysical Review Letters
Volume94
Issue number3
DOIs
StatePublished - 2005.01.28

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