Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scalar mesons in $\eta'\to3\pi^{0},\pi^{0}\pi^{+}\pi^{-}$ decays   The decays $\eta'\to3\pi^{0}$ and $\pi^{0}\pi^{+}\pi^{-}$ were consider in
isobar model approach. Branching ratio and Dalitz-plot shape of the decay
$\eta'\to3\pi^{0}$ can be explain by $a0$- and $\sigma$-meson contributions.
The $\sigma$ meson term is needed for the Dalitz-plot distribution
reconstruction. The branching ratio of the decay $\eta'\to
\pi^{0}\pi^{+}\pi^{-}$ can be calculated in the same isobar framework. The
prediction for the Dalitz-plot of this decay is shown which strongly dependents
from model parameters.

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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol