2003/05/31 by A. Kostyuk, A. P. Kostyuk, Walter Greiner +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-ex
paper · pdf · doi:10.1088/0954-3899/29/10/102
published as J.Phys. G29 (2003) L59-L66 · 10 pages, LaTeX, 3 PS-figures. V2: Misprints are corrected
openalex publication_date 2003/09/18 · arxiv created 2003/10/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
A recently published experimental dependence of the J /ψ to Drell–Yan ratio on the measured, by a zero degree calorimeter, forward energy E ZDC in Pb + Pb collisions at the CERN SPS is analysed. Using a model-independent approach it is shown that the data are at variance with an earlier published experimental dependence of the same quantity on the transverse energy of neutral hadrons E T . The discrepancy is related to a moderate centrality region: 100 ≲ N p ≲ 200 ( N p is the number of participant nucleons) and is peculiar only to the data obtained within the 'minimum bias' analysis (using the 'theoretical Drell–Yan'). This could result from systematic experimental errors in the minimum bias sample. A possible source of the errors is discussed.