Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nucleus-nucleus interaction in the perurbative QCD   Nucleus-nucleus interaction is studied in the framework of the perturbative
QCD with large number of colours and a fixed coupling constant. The pomeron
tree diagrams are summed by an effective field theory. The classical field
equations are solved by iteration procedure, which is found convergent in a
restricted domain of not too high energies and atomic numbers. The found gluon
distributions do not scale, have their maxima close to 2 GeV/c independent of
rapidity and fall towards the central rapidity region. The cross-sections
slowly grow with energy due to the contribution from peripheral collisions,
where evolution remains linear. Simple variational estimates at higher
rapidities confirm this tendency.

31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn