Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The pseudorapidity distributions of the produced charged particles in
  p-p collisions at center-of-mass energies from 23.6 to 900 GeV   In p-p collisions, there are two leading particles. One is in projectile
fragmentation region. The other is in target fragmentation region. The
investigations of present paper show that, just like in nucleus-nucleus
collisions, the revised Landau hydrodynamic model alone is not enough to have a
good description to the measured pseudorapidity distributions of the produced
charged particles in p-p collisions. Only after the leading particles are taken
into account as well, can the experimental data be matched up properly. The
theoretical model works well in p-p collisions in the whole available energy
region from sqrt(s_NN) =23.6 to 900 GeV.

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The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th