The NA50 experiment has measured, at the CERN SPS, the dimuon production in Pb-Pb collisions at 158 GeV/c per nucleon, following the program of the previous NA38 and NA51 experiments, performed with proton and light ion beams. The J/Ψ production has been studied by NA50 as a function of the centrality of the collisions. The results of the analyses performed on three data samples, collected from 1995 to 1998, show that for peripheral collisions the J/Ψ cross section can be understood in terms of ordinary nuclear absorption, consistently with the extrapolation of previous measurements extending from p-p to S-U. On the contrary, the central events show an anomalous J/Ψ suppression, and the pattern of J/Ψ yield versus centrality features two discontinuities that cannot be described by conventional models based on hadronic scenarios. These results can be considered as a strong indication of the creation of a new state of matter in central Pb-Pb collisions at the SPS. © 2001 Elsevier Science B.V.
CITATION STYLE
Monteno, M., Abreu, M. C., Alessandro, B., Alexa, C., Arnaldi, R., Atayan, M., … Willis, N. (2001). Results from the NA50 experiment on J/Ψ suppression in Pb-Pb collisions at the CERN SPS. Nuclear Physics B - Proceedings Supplements, 92(1–3), 43–54. https://doi.org/10.1016/S0920-5632(00)01018-5
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