MOMENTUM-DEPENDENCE AND ENERGY-DEPENDENCE OF J PSI SUPPRESSION IN RELATIVISTIC HEAVY-ION COLLISIONS/

With a view to understand the available data on the momentum- and ener gy-dependences of the J/psi suppression, we compute the suppression ra te within the framework of a hydrodynamical evolution model for the qu ark-gluon plasma (QGP) formation. We make use of an ansatz for the tem perature profile function which accounts not only for the space and ti me evolutions of QGP but also for the possibility of a mixed phase in the boundary region of the deconfined phase. While the predictions are made fbr the longitudinal momentum- and energy-dependences of the sup pression rate, a satisfactory agreement with the available data is fou nd for its dependences on the transverse momentum and the transverse e nergy.