Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First Results on K+ Production in pp and pD Interactions from ANKE and
  Planned Experiments on the Light Scalar Resonances a0/f0(980) at COSY   ANKE is a magnetic spectrometer and detection system at an internal target
position of COSY-Juelich optimized for charged kaon detection. Recent results
from ANKE on kaon production in pp and pD interactions are reported. From the
pp data first absolutely normalized angular and invariant-mass spectra for the
reaction pp -> dK+ K0-bar have been obtained. A partial-wave decomposition
reveals a strong contribution of S-wave KK-bar pairs with low relative energy,
suggesting dominance of resonant kaon production via the a0+(980). This
indicates that systematic studies of the light scalar resonances a0/f0(980) are
possible at COSY. Final goal of these measurements -- requiring a
neutral-particle detector which is not yet available -- is to obtain
information about the charge-symmetry breaking a0-f0 mixing. From the analysis
of the pD data it is concluded that the K+ production cross section on the
neutron is significantly larger as compared to the proton. A cross-section
ratio of sigma(n)/sigma(p) ~ 4 is deduced.

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The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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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: mtrl-th
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The categories of this paper are: q-bio
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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: ao-sci
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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg