Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charmonium Production in gamma-A, p-A and A-A   The data for the production of the $\psi'$ meson in pA collisions at 450 GeV
at CERN-SPS (of the NA50-collaboration) yields $\sigma(\psi' N)\approx 8$ mb
under the assumption that the $\psi'$ is produced as a result of the space-time
evolution of a point-like $c\bar c$ pair which expands with time to the full
size of the charmonium state. However, much higher values of $\sigma(\psi' N)$
are not ruled out by the data. We show that recent CERN data confirm the
suggestion that color fluctuations are the major source of suppression of the
$J/\psi$ yield as observed at CERN in both pA and AA collisions.

22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom