Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charmonium suppression in heavy-ion collisions   Data and their interpretations are reviewed for $J/\psi$ and $\psi^{\prime}$
production in heavy ion collisions with particular emphasis on the recently
reported discontinuity in $Pb$-$Pb$ reactions. The experimental set-up is
described and the various results for $J/\psi$ and $\psi^{\prime}$ suppressions
including their $p_T$-dependence are presented. The suppressions in $pA$
collisions are discussed in terms of final state absorption of a premeson and
the $p_T$ distributions as parton scattering in the initial state. Both
phenomena scale with the trajectory length $L$. The data for charmonium
suppression and $< p_T^2 >$ in heavy ion collisions are presented as a function
of $L$ and discussed in the light of theories assuming deconfined matter and/or
absorption by comovers.

25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc