Observation of the decay $h_{c}\to3(π^{+}π^{-})π^{0}$
Creators: name: BESIII Collaboration
name: Ablikim, M.
name: Achasov, M. N.
name: Adlarson, P.
name: Afedulidis, O.
name: Ai, X. C.
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name: Batozskaya, V.
name: Begzsuren, K.
name: Berger, N.
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name: Bertani, M.
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name: Bianchi, F.
name: Bianco, E.
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name: Cetin, S. A.
name: Chang, J. F.
name: Che, G. R.
name: Chelkov, G.
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name: Chen, Chao
name: Chen, G.
name: Chen, H. S.
name: Chen, H. Y.
name: Chen, M. L.
name: Chen, S. J.
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name: Chen, S. M.
name: Chen, T.
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name: Cui, J. J.
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name: Deng, Z. Y.
name: Denig, A.
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name: De Mori, F.
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name: Dong, X.
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name: Feng, J. H.
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Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Based on $(2712.4\pm14.1)\times10^{6}$ $ψ(3686)$ events collected with the BESIII detector, we study the decays $h_{c}\to3(π^{+}π^{-})π^{0}$, $h_{c}\to2(π^{+}π^{-})ω$, $h_{c}\to2(π^{+}π^{-})π^{0}η$, $h_{c}\to2(π^{+}π^{-})η$, and $h_{c}\to p\bar{p}$ via $ψ(3686)\toπ^{0}h_{c}$. The decay channel $h_{c}\to3(π^{+}π^{-})π^{0}$ is observed for the first time, and its branching fraction is determined to be $\left( {9.28\pm 1.14 \pm 0.77} \right) \times {10^{ - 3}}$, where the first uncertainty is statistical and the second is systematic. In addition, first evidence is found for the modes $h_{c} \to 2(π^{+}π^{-})π^{0}η$ and $h_{c}\to2(π^{+}π^{-})ω$ with significances of 4.8$σ$ and 4.7$σ$, and their branching fractions are determined to be $(7.55\pm1.51\pm0.77)\times10^{-3}$ and $\left( {4.00 \pm 0.86 \pm 0.35}\right) \times {10^{ - 3}}$, respectively. No significant signals of $h_c\to 2(π^+π^-)η$ and $h_{c}\to p\bar{p}$ are observed, and the upper limits of the branching fractions of these decays are determined to be $&lt;6.19\times10^{-4}$ and $&lt;4.40\times10^{-5}$ at the 90% confidence level, respectively.
description: 11 pages, 3 figures