Résumé
The observation of an anomalous J/ψ 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/ψ suppression pattern as a function of the forward hadronic energy EZDC 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 Npart and EZDC. Then, we check if the experimental data can be better explained by a sudden or a smooth onset of the anomalous J/ψ suppression as a function of the number of participants.
| langue originale | Anglais |
|---|---|
| Pages (de - à) | 195-203 |
| Nombre de pages | 9 |
| journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 521 |
| Numéro de publication | 3-4 |
| Les DOIs | |
| état | Publié - 29 nov. 2001 |
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