Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The mesons and baryons production in nucleus-nucleus collisions at SPS
  and RHIC energies and quark-gluon plasma   We use quasiparticle description of deconfined matter in nuclear collisions
at finite temperature and chemical potential. We assume that evolution of
expanding system is isentropic. Using theoretical formulas and experimental
meaning for the average multiplicity of charged and neutral particles and also
of net nucleons ($N-\bar{N}$) per unit central rapidity, we calculate the
initial temperature $T_0$, and the volume $V_0$ for the collisions of heavy
nuclei ($Pb+Pb$ and $Au+Au$) at SPS and RHIC energies. At calculations we use
the conservation of entropy and of number net nucleons in initial plasma stage
and on the stage of phase transition at temperature $T_c$, where we take into
account the phase of constituent quarks $m_q$ and $m_s$. The spectra of baryons
and mesons are calculated at temperature of thermal freeze-out $T_f = 120$ MeV.
The quantitative characteristic of these spectra (for example, the
normalization for baryons and mesons) are determined in the present model by
initial state - quark-gluon plasma.

34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph