Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadron multiplicities and chemical freeze-out conditions in
  proton-proton and nucleus-nucleus collisions   New results of the NA61/SHINE Collaboration at the CERN SPS on mean hadron
multiplicities in proton-proton (p+p) interactions are analyzed within the
transport models and the hadron resonance gas (HRG) statistical model. The
chemical freeze-out parameters in p+p interactions and central Pb+Pb (or Au+Au)
collisions are found and compared with each other in the range of the center of
mass energy of the nucleon pair $\sqrt{s_{NN}}=3.2-17.3$ GeV. The canonical
ensemble formulation of the HRG model is used to describe mean hadron
multiplicities in p+p interactions and the grand canonical ensemble in central
Pb+Pb and Au+Au collisions. The chemical freeze-out temperatures in p+p
interactions are found to be larger than the corresponding temperatures in
central nucleus-nucleus collisions.

15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
19
The categories of this paper are: eess