J/$ψ$ suppression in In-In collisions at 158 GeV/nucleon

Details J/$ψ$ suppression in In-In collisions at 158 GeV/nucleon J/$ψ$ suppression in In-In collisions at 158 GeV/nucleon

2007-01-22

arxiv.org/abs/nucl-ex/0701033v1

Nucl.Phys.A783:261-268,2007

Physics

Nuclear Physics

Nuclear Experiment

8 pages, 3 figures, proceedings of Hard Probes 2006 International Conference

Scientific paper

10.1016/j.nuclphysa.2006.11.081

The NA60 experiment has studied J/$\psi$ production in Indium-Indium collisions at 158 A$\cdot$GeV. In this paper we present an updated set of results obtained with the complete set of available statistics and an improved alignment of the vertex tracker. The centrality dependence of the J/$\psi$ production, obtained with an analysis technique based only on the J/$\psi$ sample, indicates that a suppression beyond that induced by nuclear absorption is present in In-In collisions, setting in at $\sim$80 participant nucleons. A first study of the systematic errors related with this measurement is discussed. We also present preliminary results on the J/$\psi$ azimuthal distributions.

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