Observation of the decay $h_{c}\to3(\pi^{+}\pi^{-})\pi^{0}$
High Energy Physics - Experiment (hep-ex)
FOS: Physical sciences
DOI:
10.48550/arxiv.2403.03500
Publication Date:
2024-03-06
AUTHORS (664)
ABSTRACT
Based on $(2712.4\pm14.1)\times10^{6}$ $\psi(3686)$ events collected with the BESIII detector, we study decays $h_{c}\to3(\pi^{+}\pi^{-})\pi^{0}$, $h_{c}\to2(\pi^{+}\pi^{-})\omega$, $h_{c}\to2(\pi^{+}\pi^{-})\pi^{0}\eta$, $h_{c}\to2(\pi^{+}\pi^{-})\eta$, and $h_{c}\to p\bar{p}$ via $\psi(3686)\to\pi^{0}h_{c}$. The decay channel $h_{c}\to3(\pi^{+}\pi^{-})\pi^{0}$ is observed for first time, its branching fraction determined to be $\left( {9.28\pm 1.14 \pm 0.77} \right) \times {10^{ - 3}}$, where uncertainty statistical second systematic. In addition, evidence found modes $h_{c} \to 2(\pi^{+}\pi^{-})\pi^{0}\eta$ $h_{c}\to2(\pi^{+}\pi^{-})\omega$ significances of 4.8$\sigma$ 4.7$\sigma$, their fractions are $(7.55\pm1.51\pm0.77)\times10^{-3}$ {4.00 0.86 0.35}\right) respectively. No significant signals $h_c\to 2(\pi^+\pi^-)\eta$ observed, upper limits these $<6.19\times10^{-4}$ $<4.40\times10^{-5}$ at 90% confidence level,
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