Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superposition model test in small CORSIKA shower simulations   The calculation of the flux of particles reaching the earth's surface, as
well as cases of simultaneous arrival at the observation level of groups of
particles -- very small Extensive Air Showers, require simulation calculations
and taking into account a much greater extent of fluctuations of the
development of the showers generated by very low energy cosmic ray particles,
much greater than usual for showers with energies near the "knee" and above due
to the very steep cosmic ray energy spectrum. These fluctuation depend
significantly on the mass number of the primary cosmic ray particle. Nuclei are
sets of nucleons and it seems an obvious approximation to assume that the
extensive air showers initiated in the upper atmosphere by atomic nuclei are a
convolution of the showers generated by single nucleons. This is called the
superposition hypothesis. In this paper, we test this superposition model. We
will show, using results of a detailed simulation program CORSIKA, that the
superposition assumption is not fulfilled for higher moments of the
distributions of the main characteristics of extensive air showers. We will
discussed some extensions of the simply superposition model that ensure
consistency with the results of detailed simulations.

13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
29
The categories of this paper are: funct-an