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Phys Rev Lett. 2005 Jan 28;94(3):032301. doi: 10.1103/PhysRevLett.94.032301. Epub 2005 Jan 26.

Centrality dependence of charged-particle pseudorapidity distributions from d + Au collisions at sqrt[sNN] = 200 GeV.

Physical review letters

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 Ristea, D Röhrich, B H Samset, D Sandberg, S J Sanders, R A Sheetz, P Staszel, T S Tveter, F Videbaek, R Wada, Z Yin, I S Zgura,

Affiliations

  1. University of Bucharest, Bucharest, Romania.

PMID: 15698255 DOI: 10.1103/PhysRevLett.94.032301

Abstract

Charged-particle pseudorapidity densities are presented for the d + Au reaction at sqrt[s(NN)] = 200 GeV with -4.2 < or = eta < or = 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 sqrt[s(NN)] = 19.4 GeV.

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