Charged particle distributions and nuclear modification at high rapidities in d+Au collisions at √s_NN = 200 GeV

2007/03/08 by STAR Collaboration
Mathematics · Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Quantum Chromodynamics and Particle Interactions #Statistical Methods and Bayesian Inference #nucl-ex

paper · pdf · doi:10.48550/arxiv.nucl-ex/0703016

8 pages, 5 figures, submitted to PLB

arxiv created 2007/03/08 · openalex publication_date 2007/03/08 · arxiv updated 2012/08/27 · openalex created_date 2022/09/14 · openalex updated_date 2026/07/28

Abstract

The measurements of the centrality dependence of dN/dη and transverse momentum spectra from mid- to forward rapidity in d+Au collisions at √s__{\rm NN} = 200 GeV are reported. They provide a sensitive tool for understanding the dynamics of multi-particle production in the high parton-density regime. In particular, we observe strong suppression of the nuclear modification factor R_CP at forward rapidities (d-side, η = 3.1) and enhancement at backward rapidity (η = -3.1). An empirical scaling is obtained for multiplicity and R_CP when a shift of the center-of-mass in the asymmetric d+Au collisions with respect to the nucleon-nucleon system is applied.

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