29,892 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
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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