Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Justification of Landau Hydrodynamic-Tube Model in Central Relativistic
  Heavy-Ion Collisions   The statistical event-by-event analysis of inelastic interactions of 16O and
32S nuclei in emulsion at 60 A GeV/c and 200 A GeV/c reveals the existence of
groups of high multiplicity events belonging to very central nuclear
interactions with Gaussian pseudorapidity distributions for produced particles
as suggested by the original hydrodynamic-tube model. Characteristics of these
events are presented. The experimental observations are interpreted as a result
of quark-gluon plasma formation in the course of central nuclear interactions.

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The categories of this paper are: stat
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
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The categories of this paper are: econ
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th