2010/11/19 by J. L. Nagle, A. D. Frawley, L. A. Linden Levy +2 · 1 citation
Mathematics · Physics and Astronomy · #Centrality #Combinatorics #Hadron #Hadronization #High-Energy Particle Collisions Research #Mathematics #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Rapidity #Sigma #Statistical physics #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.84.044911
12 pages, 16 figures, submitted for publication
arxiv created 2010/11/19 · openalex publication_date 2011/10/28 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Understanding the detailed production and hadronization mechanisms for heavy quarkonia and their modification in a nuclear environment presents one of the major challenges in QCD. Calculations including nuclear-modified parton distribution functions (nPDFs) and the fitting of breakup cross sections (\ensuremathσbr) as parameters have been successful at describing many features of J/\ensuremathψ modifications in proton (deuteron)-nucleus collisions. In this paper, we extend these calculations to explore different geometric dependencies of the modifications and confront them with new experimental results from the PHENIX experiment. We find that no combination of nPDFs and \ensuremathσbr, regardless of the nPDF parameter set and the assumed geometric dependence, can simultaneously describe the entire rapidity and centrality dependence of J/\ensuremathψ modifications in d+Au collisions at √s_NN=200 GeV. We extend these calculations to incorporate initial-state parton energy loss, which results in an improved description of the experimental data. Finally, we compare the data with previously published calculations, including coherence effects, and find them unable to describe the full rapidity and centrality dependence.