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Quark-gluon plasma; suppression rate; energy- and momentum-dependence

With a view to understand the available data on the momentum- and energy-dependences of theJ/Ψ suppression, we compute the suppression rate within the framework of a hydrodynamical evolution model for the quark-gluon plasma (QGP) formation. We make use of an ansatz for the temperature profile function which accounts not only for the space and time 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 for the longitudinal momentum- and energy-dependences of the suppression rate, a satisfactory agreement with the available data is found for its dependences on the transverse momentum and the transverse energy.

R S Kaushal¹ S K Karn¹

1. Department of Physics and Astrophysics, University of Delhi, Delhi - 110 007, India

Published

February 1995

Manuscript received

29 August 1994

Manuscript revised

24 November 1994