Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the Muon content of Extensive Air Showers with the Pierre
  Auger Observatory   Several methods developed within the Pierre Auger Collaboration for the
estimation of the muonic component of the Extensive Air Showers observed in the
surface Cherenkov detectors are described. The results derived from the data
show a deficit of muons predicted by the current hadronic interactions models
at ultra-high energies.

16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph