Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic Ray particle production   The status of some popular models to simulate hadronic and nuclear
interactions at Cosmic Ray energies is reviewed. The models predict the rise of
all the hadronic and nuclear cross sections with energy and a smooth
(logarithmic) rise of average multiplicities, rapidity plateaus and average
transverse momenta with the energy. The importance is stressed to put more
effort into the models and especially a better understanding of the minijet
component at the highest energies. Likewise, experimental data on particle
production are needed at the highest possible energies, to guide the models.

1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio