First observations of $h_c\to$ hadrons

Abstract

Based on $(4.48\pm 0.03)\times 10^8$ $\psi (3686)$ events collected with the BESIII detector, five $h_c$ hadronic decays are searched for via process $\psi (3686)\to {\pi }^0{h}_c$. Three of them, $h_c\to p\bar{p}{\pi }^{+}{\pi }^{-}$, ${\pi }^{+}{\pi }^{-}{\pi }^0$, and $2({\pi }^{+}{\pi }^{-}){\pi }^0$ are observed for the first time, with statistical significances of 7.4$\sigma$, $4.9\sigma$, and 9.1$\sigma$, and branching fractions of $(2.89\pm 0.32\pm 0.55)\times 10^{-3}$, $(1.60\pm 0.40\pm 0.32)\times 10^{-3}$, and $(7.44\pm 0.94\pm 1.56)\times 10^{-3}$, respectively, where the first uncertainties are statistical and the second systematic. No significant signal is observed for the other two decay modes, and the corresponding upper limits of the branching fractions are determined to be $B(h_c\to 3({\pi }^{+}{\pi }^{-}){\pi }^0)<8.7\times 10^{-3}$ and $B(h_c\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-})<5.8\times 10^{-4}$ at 90% confidence level.

17 pages, 16 figures

References in corpus (1)

• Determination of the number of $\psi (3686)$ events at BESIII

Cited by in corpus (9)

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• Search for New Hadronic Decays of $h_c$ and Observation of $h_c\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}{\pi }^0$
• QCD analysis of the $P$-wave charmonium electromagnetic Dalitz decays $h_c\to {\eta }^{(\prime )}{\ell }^{+}{\ell }^{-}$
• Study of charmonium production using decays to hadronic final states with the LHCb experiment
• Recent Results on Charmonia- and Bottomonia-like Particles at Belle
• Measurements of the branching fractions of the $P$-wave charmonium spin-singlet state $h_c{(}^1{P}_1)\to h^{+}{h}^{-}{\pi }^0/\eta$
• Observation of Charmonium $h_c$ Radiative Decays to Multiple Light Hadrons and the Tensor State $f_2(1270)$