Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universality of electron-positron distributions in extensive air showers   Using a large set of simulated extensive air showers, we investigate
universality features of electron and positron distributions in
very-high-energy cosmic-ray air showers. Most particle distributions depend
only on the depth of the shower maximum and the number of particles in the
cascade at this depth. We provide multi-dimensional parameterizations for the
electron-positron distributions in terms of particle energy, vertical and
horizontal momentum angle, lateral distance, and time distribution of the
shower front. These parameterizations can be used to obtain realistic
electron-positron distributions in extensive air showers for data analysis and
simulations of Cherenkov radiation, fluorescence signal, and radio emission.

20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom