Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inclusive $V^0$ Production Cross Sections from 920 GeV Fixed Target
  Proton-Nucleus Collisions   Inclusive differential cross sections $d\sigma_{pA}/dx_F$ and
$d\sigma_{pA}/dp_t^2$ for the production of \kzeros, \lambdazero, and
\antilambda particles are measured at HERA in proton-induced reactions on C,
Al, Ti, and W targets. The incident beam energy is 920 GeV, corresponding to
$\sqrt {s} = 41.6$ GeV in the proton-nucleon system. The ratios of differential
cross sections \rklpa and \rllpa are measured to be $6.2\pm 0.5$ and $0.66\pm
0.07$, respectively, for \xf $\approx-0.06$. No significant dependence upon the
target material is observed. Within errors, the slopes of the transverse
momentum distributions $d\sigma_{pA}/dp_t^2$ also show no significant
dependence upon the target material. The dependence of the extrapolated total
cross sections $\sigma_{pA}$ on the atomic mass $A$ of the target material is
discussed, and the deduced cross sections per nucleon $\sigma_{pN}$ are
compared with results obtained at other energies.

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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ph
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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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: chao-dyn
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The categories of this paper are: quant-ph
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The categories of this paper are: physics
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex