Centrality dependence of charged particle pseudorapidity distributions from d+Au collisions at s(NN)**(1/2) = 200-GeV
Jan, 2004Citations per year
Abstract:
Charged-particle pseudorapidity densities are presented for the d+Au reaction at sqrt{s_{NN}}=200 GeV with -4.2 <= eta <= 4.2$. The results, from the BRAHMS experiment at RHIC, 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, semi-classical 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.Note:
- 4 pages, 3figures: expanded discussion of uncertainties: added 60-80% centrality range: added additional discussion on centrality selection bias
- 25.75.Dw
- deuteron-nucleus reactions
- quantum chromodynamics
- nucleus nucleus: colliding beams
- scattering: heavy ion
- deuteron
- gold
- hadron: multiple production
- charged particle: multiplicity
- rapidity: density
References(20)
Figures(3)