Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: a0+(980)-resonance production in the reaction pp -> dpi+eta close to the
  K(bar(K)) threshold   The reaction pp -> dpi+eta has been measured at a beam energy of T=2.65 GeV
(p=3.46 GeV/c) using the ANKE spectrometer at COSY-Juelich. The missing mass
distribution of the detected dpi+ pairs exhibits a peak around the eta mass on
top of a strong background of multi-pion pp -> dpi+(n(pi)) events. The
differential cross section d^4(sigma)/d(Omega_d)d(Omega_pi+)d(p_d)d(p_pi+) for
the reaction pp -> dpi+eta has been determined model independently for two
regions of phase space. Employing a dynamical model for the a0+ production
allows one then to deduce a total cross section of sigma(pp -> da0+ ->
dpi+eta)=(1.1 +/- 0.3_(stat) +/- 0.7_(syst)) microbarn for the production of
pi+eta via the scalar a0+(980) resonance and sigma(pp -> dpi+eta) = (3.5 +/-
0.3_(stat) +/- 1.0_(syst)) microbarn for the non-resonant production. Using the
same model as for the interpretation of recent results from ANKE for the
reaction pp -> dK+(bar(K0)), the ratio of the total cross sections is sigma(pp
-> d(K+(bar(K0)))_(L=0))/sigma(pp -> da0+ -> dpi+eta) = 0.029 +/- 0.008_(stat)
+/- 0.009_(syst), which is in agreement with branching ratios in the
literature.

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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc