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A model-independent analysis of the dependence of the anomalous J/psi suppression on the number of participant nucleons

A. P. Kostyuk·W. Greiner
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Abstract

A recently published experimental dependence of the J/psi 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 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 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.

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A. P. Kostyuk, W. Greiner. 2003-10-15. A model-independent analysis of the dependence of the anomalous J/psi suppression on the number of participant nucleons. https://doi.org/10.1088/0954-3899%2F29%2F10%2F102

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