Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: J-Psi Suppression in Hadron-Nucleus Collisions   We examine the production of J/$\Psi$ mesons in high energy hadron-nucleus
collisions using models that account for both the initial state modification of
parton distributions in nuclei and the final state interaction of the produced
$c\bar c$ pairs. We show that, at the energies of current fixed target
experiments, J/$\Psi$ production through quark-antiquark annihilation gives the
largest contribution at $x_F > 0.5$, while gluon-gluon fusion dominates the
production at smaller $x_F$. The observed J/$\Psi$ suppression at large $x_F$
is directly connected to nuclear shadowing in deeply inelastic scattering. We
find that a $6\sim 8$mb $c\bar c$-nucleon cross section is needed to explain
the data on J/$\Psi$ suppression if a simple incoherent multiple scattering
formalism is used for the final state interactions.

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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
10
The categories of this paper are: q-bio
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The categories of this paper are: stat