Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transverse momentum spectra of hadrons in $p+p$ collisions at CERN SPS
  energies from the UrQMD transport model   The UrQMD transport model, version 3.4, is used to study the new experimental
data on transverse momentum spectra of $\pi^{\pm}$, $K^{\pm}$, $p$ and $\bar p$
produced in inelastic $p+p$ interactions at SPS energies, recently published by
the NA61/SHINE Collaboration. The comparison of model predictions to these new
measurements is presented as a function of collision energy for central and
forward particle rapidity intervals. In addition, the inverse slope parameters
characterizing the transverse momentum distributions are extracted from the
predicted spectra and compared to the corresponding values obtained from
NA61/SHINE distributions, as a function of particle rapidity and collision
energy. A complex pattern of deviations between the experimental data and the
UrQMD model emerges. For charged pions, the fair agreement visible at top SPS
energies deteriorates with the decreasing energy. For charged $K$ mesons, UrQMD
significantly underpredicts positive kaon production at lower beam momenta. It
also underpredicts the central rapidity proton yield at top collision energy
and overpredicts antiproton production at all considered energies. We conclude
that the new experimental data analyzed in this paper still constitute a
challenge for the present version of the model.

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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
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The categories of this paper are: math
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The categories of this paper are: dg-ga