Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Seasonal Modulations of the Underground Cosmic-Ray Muon Energy   The parameters of the seasonal modulations (variations) in the intensity of
muons and cosmogenic neutrons generated by them at a mean muon energy of 280
GeV have been determined in the LVD (Large Volume Detector) experiment. The
modulations of muons and neutrons are caused by a temperature effect, the
seasonal temperature and density variations of the upper atmospheric layers.
The analysis performed here leads to the conclusion that the variations in the
mean energy of the muon flux are the main source of underground cosmogenic
neutron variations, because the energy of muons is more sensitive to the
temperature effect than their intensity. The parameters of the seasonal
modulations in the mean energy of muons and the flux of cosmogenic neutrons at
the LVD depth have been determined from the data obtained over seven years of
LVD operation.

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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ph