Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for \eta_{c}(2S) in \psi(3686) \to \gamma
  K_{S}^{0}K^{\pm}\pi^{\mp}\pi^{+}\pi^{-}   We search for the M1 radiative transition \psi(3686) \to \gamma\eta_{c}(2S)
by reconstructing the exclusive \eta_{c}(2S) \to
K_{S}^{0}K^{\pm}\pi^{\mp}\pi^{+}\pi^{-} decay using 1.06 \times 10^8 \psi(3686)
events collected with the BESIII detector. The signal is observed with a
statistical significance of greater than 4 standard deviations. The measured
mass of the \eta_{c}(2S) is 3646.9 \pm 1.6(stat) \pm 3.6(syst) MeV/c^2, and the
width is 9.9 \pm 4.8(stat) \pm 2.9(syst) MeV/c^2. The product branching
fraction is measured to be B(\psi(3686) \to \gamma\eta_{c}(2S)) \times
B(\eta_{c}(2S) \to K_{S}^{0}K^{\pm}\pi^{\mp}\pi^{+}\pi^{-}) = (7.03 \pm
2.10(stat) \pm 0.70(syst)) \times 10^{-6}. This measurement complements a
previous BESIII measurement of \psi(3686) \to \gamma\eta_{c}(2S) with
\eta_{c}(2S) \to K_{S}^{0} K^{\pm}\pi^{\mp} and K^{+}K^{-}\pi^{0}.

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The categories of this paper are: hep-ph
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The categories of this paper are: math
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: astro-ph
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph