Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Origin of the Difference between Multiplicities in e+e- Annihilation
  and Heavy Ion Collisions   Multiplicities in e+e- annihilation and relativistic heavy ion collisions
show remarkable similarities at high energies. A thermal-statistical model is
proposed to explain the differences which occur mainly at low beam energies.
Two different calculations are performed, one using an approximate
thermodynamic relationship, the other using a full thermal model code. The
results are in qualitative agreement, suggesting that the interplay of baryon
density and temperature tends to systematically suppress the total multiplicity
at lower beam energies.

24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an