Regular Article - Experimental Physics
J/ψ production measurements by the PHENIX experiment
Laboratoire Leprince Ringuet, École Polytechnique/IN2P3, 91128, Palaiseau Cedex, France
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Published online: 13 February 2009
Quarkonia suppression is considered to be one of the key probes of the Quark Gluon Plasma (QGP) created in heavy ion collisions. The PHENIX experiment has measured J/ψ production in a variety of colliding systems. Measurements made in p+p collisions show good agreement with pQCD predictions and serve as baseline for other systems at the same collision energy. The cold nuclear matter contribution to the suppression is constrained through measurements in d+Au collisions. In Au+Au, the suppression observed at mid rapidity is smaller than that at forward rapidity, a tendency opposite to what is expected from the higher gluon density at mid rapidity. The results will be presented and discussed in this article.
© Springer-Verlag , 2009