Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for Low Mass Exotic mesonic structures. Part II: attempts to
  understand the experimental results   Our previous paper, part I of the same study, shows the different
experimental spectra used to conclude on the genuine existence of narrow,
weakly excited mesonic structures, having masses below and a little above the
pion (M=139.56 MeV) mass. This work \cite{previous} was instigated by the
observation, in the $\Sigma^{+}$ disintegration: $\Sigma^{+}\to$pP$^{0}$,
P$^{0}\to\mu^{-}\mu^{+}$ \cite{park}, of a narrow range of dimuon masses. The
authors conclude on the existence of a neutral intermediate state P$_{0}$, with
a mass M=214.3 MeV $\pm$ 0.5 MeV. We present here some attempts to understand
the possible nature of the structures observed in part I.

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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: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: nlin