Abstract
The observation of an anomalous J/psi suppression in Pb-Pb collisions by the NA50 Collaboration can be considered as the most striking indication for the deconfinement of quarks and gluons at SPS energies. In this Letter, we determine the J/psi suppression pattern as a function of the forward hadronic energy E-ZDC measured in a Zero Degree Calorimeter (ZDC). The direct connection between EZDC and the geometry of the collision allows us to calculate, within a Glauber approach, the precise relation between the number of participant nucleons N-part and E-ZDC. Then, we check if the experimental data can be better explained by a sudden or a smooth onset of the anomalous J/psi suppression as a function of the number of participants. (C) 2001 Elsevier Science B.V. All rights reserved.
| Lingua originale | Inglese |
|---|---|
| pagine (da-a) | 195-203 |
| Numero di pagine | 9 |
| Rivista | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 521 |
| Numero di pubblicazione | 3-4 |
| DOI | |
| Stato di pubblicazione | Pubblicato - 29 nov 2001 |
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