Centrality Dependence of Charged-Hadron Transverse-Momentum Spectra ind+AuCollisions atsNN=200 GeV

2003/06/18 by B. B. Back, M. D. Baker, M. Ballintijn +65 · 17 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-ex

paper · pdf · doi:10.1103/physrevlett.91.072302

published as Phys.Rev.Lett.91:072302,2003 · 5 pages, 4 figures, submitted to PRL

arxiv created 2003/06/18 · openalex publication_date 2003/08/15 · arxiv updated 2009/12/01 · openalex created_date 2016/08/23 · openalex updated_date 2026/07/28

Abstract

We have measured transverse momentum distributions of charged hadrons produced in d+Au collisions at √s_NN=200 GeV. The spectra were obtained for transverse momenta 0.25<p_T<6.0 GeV/c, in a pseudorapidity range of 0.2<\ensuremathη<1.4 in the deuteron direction. The evolution of the spectra with collision centrality is presented in comparison to p+p collisions at the same collision energy. With increasing centrality, the yield at high transverse momenta increases more rapidly than the overall particle density, leading to a strong modification of the spectral shape. This change in spectral shape is qualitatively different from observations in Au+Au collisions at the same energy. The results provide important information for discriminating between different models for the suppression of high-p_T hadrons observed in Au+Au collisions.

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