Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Combined analysis of eta' production reactions: gamma N -> eta' N, N N
  -> N N eta', and pi N -> eta' N   The production of eta' mesons in photon- and hadron-induced reactions has
been revisited in view of the recent additions of high-precision data to the
world data base. Based on an effective Lagrangian approach, we have performed a
combined analysis of the free and quasi-free gamma N -> eta' N, N N -> N N
eta', and pi N -> eta' N reactions. Considering spin-1/2 and -3/2 resonances,
we found that a set of above-threshold resonances {S_{11}, P_{11}, P_{13}},
with fitted mass values of about M_R=1925, 2130, and 2050 MeV, respectively,
and the four-star sub-threshold P_{13}(1720) resonance reproduce best all
existing data for the eta' production processes in the resonance-energy region
considered in this work. All three above-threshold resonances found in the
present analysis are essential and indispensable for the good quality of the
present fits.

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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: econ
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
2
The categories of this paper are: math
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: astro-ph