Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraining pion interactions at very high energies by cosmic ray data   We demonstrate that a substantial part of the present uncertainties in model
predictions for the average maximum depth of cosmic ray-induced extensive air
showers is related to very high energy pion-air collisions. Our analysis shows
that the position of the maximum of the muon production profile in air showers
is strongly sensitive to the properties of such interactions. Therefore, the
measurements of the maximal muon production depth by cosmic ray experiments
provide a unique opportunity to constrain the treatment of pion-air
interactions at very high energies and to reduce thereby model-related
uncertainties for the shower maximum depth.

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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio