A model-independent analysis of the dependence of the anomalous J/psi suppression on the number of participant nucleons
A. P. Kostyuk, W. Greiner
Abstract
A recently published experimental dependence of the J/psi to Drell-Yan ratio on the measured, by a zero degree calorimeter, forward energy EZDC in Pb+Pb collisions at the CERN SPS is analyzed. 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 ET. The discrepancy is related to a moderate centrality region: 100 < Np < 200 (Np 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.
Create a lesson
Related papers
Physics with Radioactive Ion Beams at the Nuclear Science Laboratory
W. S. Porter, D. W. Bardayan, M. Brodeur et al.
16O(p,γ)17F Reaction and the C and O Isotopic Ratios in Red Giant Branch Stars
D. Robb, P. McGlynn, M. Aliotta et al.
Probing the production mechanisms of virtual photons at RHIC
STAR Collaboration
The 3He(α,γ)7Be γ-ray angular distribution: measured, and calculated by effective field theory
S. Turkat, P. Hempel, X. Zhang et al.
Letter of Intent for Alpha Knockout from Nuclei in Hard Exclusive Processes with ALERT
Whitney R. Armstrong†, Ian Cloët, Fernando A. Flor et al.
Probing high-momentum components in 16O via zero-degree (p,d) cross-section ratios
FRS Experiment Collaboration, X. Wang, H. J. Ong et al.