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J/psi measurements in STAR Experiment at RHIC

Author:
Hajkova, Olga  


Journal:
28TH WINTER WORKSHOP ON NUCLEAR DYNAMICS 2012


Issue Date:
2012


Abstract(summary):

During the last decade STAR experiment has studied the hot and dense nuclear matter produced in heavy ion collisions at RHIC. The study of quarkonia, such as J/psi, meson, production provides the information about properties of this nuclear matter. It is predicted that due to the Debye screening the quarkonia production is suppressed when Quark Gluon Plasma (QGP) is presented. In order to understand the properties of hot and dense nuclear matter, it is necessary to study the production of quarkonia in hadron-hadron, hadron-ion, and ion-ion collisions separately to distinguish cold nuclear matter effect, such as gluon shadowing, from the suppression due to the formation of QGP. Moreover, the J/psi, hadron azimuthal correlations allow to extract the fraction of J/psi, that originates from B-mesons. This proceedings presents recent J/psi, measurements at mid-rapidity in p+p, and Au+Au collisions at root s(NN) = 200 GeV at STAR, the fraction of J/psi, originates from B-mesons, and J/psi, eliptic flow v(2) as a function of transverse momentum in Au+Au collisions in root s(NN) = 200 GeV at STAR.


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