3 research outputs found
J/Psi suppression in colliding nuclei: statistical model analysis
We consider the suppression at a high energy heavy ion collision. An
ideal gas of massive hadrons in thermal and chemical equilibrium is formed in
the central region. The finite-size gas expands longitudinally in accordance
with Bjorken law. The transverse expansion in a form of the rarefaction wave is
taken into account. We show that suppression in such an environment,
when combined with the disintegration in nuclear matter, gives correct
evaluation of NA38 and NA50 data in a broad range of initial energy densities.Comment: 14 pages, 13 figures. Accepted for publication in Phys. Rev.
Enhanced J/psi suppression due to gluon depletion
The nonlinear effect of gluon depletion in the collision of large nuclei can
be large. It is due to multiple scatterings among comoving partons initiated by
primary scattering of partons in the colliding nuclei. The effect can give rise
to substantial suppression of production in very large nuclei, even if
the linear depletion effect is insignificant for the collisions of nuclei of
smaller sizes. This mechanism offers a natural explanation of the enhanced
suppression in the Pb-Pb data recently observed by NA50.Comment: 6 pages + 2 figures (in ps file), LaTex, submitted to Phys. Rev. Let