Search for New Hadronic Decays of $h_c$ and Observation of $h_c\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}{\pi }^0$

Abstract

Ten hadronic final states of the $h_c$ decays are investigated via the process $\psi (3686)\to {\pi }^0{h}_c$, using a data sample of $(448.1\pm 2.9)\times 10^6$ $\psi (3686)$ events collected with the BESIII detector. The decay channel $h_c\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}{\pi }^0$ is observed for the first time with a significance of $6.0\sigma$. The corresponding branching fraction is determined to be $\mathcal{B}(h_c\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}{\pi }^0)=(3.3\pm 0.6\pm 0.6)\times 10^{-3}$ (the first uncertainty is statistical and the second systematical). Evidence for the decays $h_c\to {\pi }^{+}{\pi }^{-}{\pi }^0\eta$ and $h_c\to K_S^0{K}^{\pm }{\pi }^{\mp }{\pi }^{+}{\pi }^{-}$ is found with a significance of $3.6\sigma$ and $3.8\sigma$, respectively. The corresponding branching fractions (and upper limits) are obtained to be $\mathcal{B}(h_c\to {\pi }^{+}{\pi }^{-}{\pi }^0\eta )=(7.2\pm 1.8\pm 1.3)\times 10^{-3}$ $(<1.8\times 10^{-2})$ and $\mathcal{B}(h_c\to K_S^0{K}^{\pm }{\pi }^{\mp }{\pi }^{+}{\pi }^{-})=(2.8\pm 0.9\pm 0.5)\times 10^{-3}$ $(<4.7\times 10^{-3})$. Upper limits on the branching fractions for the final states $h_c\to K^{+}{K}^{-}{\pi }^0$, $K^{+}{K}^{-}\eta$, $K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}\eta$, $2(K^{+}{K}^{-}){\pi }^0$, $K^{+}{K}^{-}{\pi }^0\eta$, $K_S^0{K}^{\pm }{\pi }^{\mp }$, and $p\bar{p}{\pi }^0{\pi }^0$ are determined at a confidence level of 90\%.

arXiv comment10 pages, 2 figures

References in corpus (18)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Future Physics Programme of BESIII
• Rigorous QCD Predictions for Decays of P-Wave Quarkonia
• Search for hadronic transition ${\chi }_{cJ}\to {\eta }_c{\pi }^{+}{\pi }^{-}$ and observation of ${\chi }_{cJ}\to K\bar{K}\pi \pi \pi$
• Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη
• Observation of h_c(^1P_1) State of Charmonium
• Measurements of h_c(^1P_1) in psi' Decays
• Determination of the number of $\psi (3686)$ events at BESIII
• Precision Measurement of the Mass of the h_c(1P1) State of Charmonium
• Cross section measurements of $e^{+}{e}^{-}\to \omega {\chi }_{c0}$ from $\sqrt{s}=$4.178 to 4.278 GeV
• Observation of the ^1P_1 State of Charmonium
• Study of $\psi (3686)\to {\pi }^0{h}_c,h_c\to \gamma {\eta }_c$ via ${\eta }_c$ exclusive decays
• Study of tracking efficiency and its systematic uncertainty from $J/\psi \to p\overline{p}{\pi }^{+}{\pi }^{-}$ at BESIII
• Evidence for Decays of h_c to Multi-Pion Final States
• First observations of $h_c\to$ hadrons
• Measurements of the absolute branching fractions and $CP$ asymmetries for $D^{+}\to K_{S,L}^0{K}^{+}({\pi }^0)$

Cited by in corpus (3)

• QCD analysis of the $P$-wave charmonium electromagnetic Dalitz decays $h_c\to {\eta }^{(\prime )}{\ell }^{+}{\ell }^{-}$
• 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 $f_2(1270)$