Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resonant vibrational-excitation cross sections and rate constants for
  low-energy electron scattering by molecular oxygen   Resonant vibrational-excitation cross sections and rate constants for
electron scattering by molecular oxygen are presented. Transitions between all
42 vibrational levels of O$_2(\textrm{X}\ ^3\Sigma_g^- $) are considered.
Molecular rotations are parameterized by the rotational quantum number $J$
which is considered in the range 1 to 151. The lowest four resonant states of
O$_2^-$, $^2\Pi_g$, $^2\Pi_u$, $^4\Sigma_u^-$ and $^2\Sigma_u^-$, are taken
into account. The calculations are performed using the fixed-nuclei R-matrix
approach to determine the resonance positions and widths, and the boomerang
model to characterize the nuclei motion. Two energy regions below and above
4~eV are investigated: the first one is characterized by sharp structures in
the cross section, and the second by a broad resonance peaked at 10~eV. The
computed cross sections are compared with theoretical and experimental results
available in literature for both the energy regions, and are made available for
use by modelers. The effect of including rotational motion is found to be
non-negligible.

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The categories of this paper are: stat
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
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The categories of this paper are: math
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat