Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parton Percolation in Nuclear Collisions   An essential prerequisite for quark-gluon plasma production in nuclear
collisions is cross-talk between the partons from different nucleons in the
colliding nuclei. The initial density of partons is determined by the parton
distribution functions obtained from deep inelastic lepton-hadron scattering
and by the nuclear geometry; it increases with increasing $A$ and/or $\sqrt s$.
In the transverse collision plane, this results in clusters of overlapping
partons, and at some critical density, the cluster size suddenly reaches the
size of the system. The onset of large-scale cross-talk through color
connection thus occurs as geometric critical behavior. Percolation theory
specifies the details of this transition, which leads to the formation of a
condensate of deconfined partons. Given sufficient time, this condensate could
eventually thermalize. However, already the onset of parton condensation in the
initial state, without subsequent thermalization, leads to a number of
interesting observable consequences.

35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex