Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New calculation of antiproton production by cosmic ray protons and
  nuclei   A dramatic increase in the accuracy and statistics of space-borne cosmic ray
(CR) measurements has yielded several breakthroughs over the last several
years. The most puzzling is the rise in the positron fraction above ~10 GeV
over the predictions of the propagation models assuming pure secondary
production. The accuracy of the antiproton production cross section is critical
for astrophysical applications and searches for new physics since antiprotons
in CRs seem to hold the keys to many puzzles including the origin of those
excess positrons. However, model calculations of antiproton production in CR
interactions with interstellar gas are often employing parameterizations that
are out of date or are using outdated physical concepts. That may lead to an
incorrect interpretation of antiproton data which could have broad consequences
for other areas of astrophysics. In this work, we calculate antiproton
production in pp-, pA-, and AA-interactions using EPOS-LHC and QGSJET-II-04,
two of the most advanced Monte Carlo (MC) generators tuned to numerous
accelerator data including those from the Large Hadron Collider (LHC). We show
that the antiproton yields obtained with these MC generators differ by up to an
order of magnitude from yields of parameterizations commonly used in
astrophysics.

28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-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: funct-an
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio