Kinetic formation of J/psi at RHIC

Centrality dependence of J/psi production in Au-Au collisions at
sqrt{s_{NN}}=200 GeV is studied using the Glauber model plus the kinetic
formation model. Initial J/psi production and destruction by incoming
nucleons are described by the Glauber model. J/psi-charm equilibration in
the gluon plasma is described by the kinetic formation model. We explore the
possibility of J/psi suppression suggested by recent PHENIX data. We show
that the J/psi yield monotonically decreases with increasing centrality in
the kinetic formation model when the charm mass is smaller than a critical
mass. The final J/psi yield is between the value after the Glauber
suppression and the dynamical equilibrium value. This underscores the
importance of both J/psi production from d-Au collisions, which is essential
in determining the Glauber suppression, and high statistics Au-Au data,
which can further constrain final state J/psi-charm equilibration.