J/Ψ measurements in Au+Au and p+p collisions at √sNN=200 GeV

In a system of deconfined quarks and gluons heavy quarkonium states are expected to be the subject of dissociation via static mechanisms such as colour screening or dynamic mechanisms such as gluon scatterings. This leads to a suppression of hidden charm states, such as J/psi. On the other hand, statistical hadronization models predict an enhanced production of hidden charm states for sufficiently high charm densities. We present first preliminary STAR results on J/psi. production via the reconstruction of electron-positron decay pairs in p + p and Au + Au collisions at root s(NN) = 200 GeV. The implications of our measurements to models that predict copious J/psi. production via statistical hadronization are discussed.