35,532 research outputs found
Gluon saturation effects on J/Psi production in heavy ion collisions
We consider a novel mechanism for J/Psi production in nuclear collisions
arising due to the high density of gluons. We calculate the resulting J/Psi
production cross section as a function of rapidity and centrality. We evaluate
the nuclear modification factor and show that the rapidity distribution of the
produced J/Psi's is significantly more narrow in AA collisions due to the gluon
saturation effects. Our results indicate that gluon saturation in the colliding
nuclei is a significant source of J/Psi suppression that can be disentangled
from the quark-gluon plasma effects.Comment: 5 pages, 3 figures; v2: typos corrected; presentation improve
The role of graphics super-workstations in a supercomputing environment
A new class of very powerful workstations has recently become available which integrate near supercomputer computational performance with very powerful and high quality graphics capability. These graphics super-workstations are expected to play an increasingly important role in providing an enhanced environment for supercomputer users. Their potential uses include: off-loading the supercomputer (by serving as stand-alone processors, by post-processing of the output of supercomputer calculations, and by distributed or shared processing), scientific visualization (understanding of results, communication of results), and by real time interaction with the supercomputer (to steer an iterative computation, to abort a bad run, or to explore and develop new algorithms)
Diffractive dissociation and saturation scale from non-linear evolution in high energy DIS
This paper presents the first numerical solution to the non-linear evolution
equation for diffractive dissociation processes in deep inelastic scattering.
It is shown that the solution depends on one scaling variable , where is the saturation scale for the diffraction
processes. The dependence of the saturation scale on both
and is investigated, ( is a minimal rapidity gap for
the diffraction process). The - dependence of turns out to be the
same as of the saturation scale in the total inclusive DIS cross section. In
our calculations reveals only mild dependence on . The
scaling is shown to hold for but is violated at .Comment: 13 pages, 9 figure
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