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arXiv · hep-ph/0111429

Centrality Behaviour of J/$ψ$ Production in Na50

SÉRGIO RAMOS
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Abstract

The J/$ψ$ production in 158 A GeV Pb-Pb interactions is studied, in the dimuon decay channel, as a function of centrality, as measured with the electromagnetic or with the very forward calorimeters. After a first sharp variation at mid centrality, both patterns continue to fall down and exhibit a curvature change at high centrality values. This trend excludes any conventional hadronic model and is in agreement with a deconfined quark-gluon phase scenario. We report also preliminary results on the measured charged multiplicity, as given by a dedicated detector.

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SÉRGIO RAMOS. 2001-11-29. Centrality Behaviour of J/$ψ$ Production in Na50. https://doi.org/10.1142/9789812778048_0021

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