Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coulomb interaction on pion production in Au+Au collisions at
  relativistic energies   Coulomb effects on charged pion transverse momentum spectra produced in Au+Au
collisions at RHIC-BES energies are investigated. From these spectra the
{\pi}-/{\pi}+ ratios as a function of transverse momentum are obtained and used
to extract the Coulomb kick (a momentum change due to Coulomb interaction) and
initial pion ratio for three different collision energies and various
centrality classes. The Coulomb kick shows a decrease with the increase of beam
energy and a clear centrality dependence, with larger values for the most
central collisions. The results are connected with the kinetic freeze-out
dynamics and discussed.

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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: econ