Quarkonia production in STAR

TL;DRAbstract

The results on and production in p+p, d+Au, Cu+Cu and Au+Au collisions obtained by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC) are presented. Studies of the quarkonia production in ultrarelativistic heavy ion collisions are expected to provide valuable information on properties of the dense nuclear medium produced in these collisions as the production is believed to be effected by the Debye color screening of the potential between the heavy quarks. Lattice QCD calculations imply that a sequential suppression of quarkonia states may indicate the temperature of the quark-gluon plasma (QGP) produced in the collisions. The suppression is measured via ratio of production in A+A to properly scaled with the number of collisions yield in p+p (R AA ). Those measurements could be complicated by presence of cold nuclear matter effects, which in general used to be studied with p+A collisions, but in case of the STAR experiment are investigated in d+A interactions. Preliminary

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