Observation of ${\chi }_{cJ}\to p\bar{p}{K}_S^0{K}^{-}{\pi }^{+}+c.c.$

Abstract

By analyzing $(27.12\pm 0.14)\times 10^8$ $\psi (3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decays of ${\chi }_{cJ}\to p\bar{p}{K}_S^0{K}^{-}{\pi }^{+}+c.c.(J=0,1,2)$ are observed for the first time with statistical significances greater than $10\sigma$. The branching fractions of these decays are determined to be $\mathcal{B}({\chi }_{c0}\to p\bar{p}{K}_S^0{K}^{-}{\pi }^{+}+c.c.)=(2.61\pm 0.27\pm 0.32)\times 10^{-5},$ $\mathcal{B}({\chi }_{c1}\to p\bar{p}{K}_S^0{K}^{-}{\pi }^{+}+c.c.)=(4.16\pm 0.24\pm 0.46)\times 10^{-5},$ and $\mathcal{B}({\chi }_{c2}\to p\bar{p}{K}_S^0{K}^{-}{\pi }^{+}+c.c.)=(5.63\pm 0.28\pm 0.46)\times 10^{-5}$, respectively. The processes ${\chi }_{c1,2}\to \bar{p}\Lambda (1520)K_S^0{\pi }^{+}+c.c.$ are also observed, with statistical significances of 5.7$\sigma$ and 7.0$\sigma$, respectively. Evidence for ${\chi }_{c0}\to \bar{p}\Lambda (1520)K_S^0{\pi }^{+}+c.c.$ is found with statistical significances of 3.3$\sigma$ each. The corresponding branching fractions are determined to be $\mathcal{B}({\chi }_{c0}\to \bar{p}\Lambda (1520)K_S^0{\pi }^{+}+c.c.)=(1.61_{-0.64}^{+0.68}\pm 0.23)\times 10^{-5}$, $\mathcal{B}({\chi }_{c1}\to \bar{p}\Lambda (1520)K_S^0{\pi }^{+}+c.c.)=(4.06_{-0.76}^{+0.80}\pm 0.52)\times 10^{-5}$, and $\mathcal{B}({\chi }_{c2}\to \bar{p}\Lambda (1520)K_S^0{\pi }^{+}+c.c.)=(4.09_{-0.84}^{+0.87}\pm 0.42)\times 10^{-5}$. Here, the first uncertainties are statistical and the second ones are systematic.

arXiv comment12 pages, 5 figures

References in corpus (17)

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• Colour Octet Contribution in Exclusive P-Wave Charmonium Decay into Octet and Decuplet Baryons
• Colour-octet contributions to exclusive charmonium decays
• Study of the Hadronic Decays of χ_c States
• Measurement of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0\psi (3686)$ at $\sqrt{s}$ from 4.009 to 4.600 GeV and observation of a neutral charmoniumlike structure
• Measurement of ${\chi }_{cJ}$ decaying into $p\bar{n}{\pi }^{-}$ and $p\bar{n}{\pi }^{-}{\pi }^0$
• Measurements of the branching fractions of $\psi (3686)\to {\bar{\Sigma }}^0\Lambda +c.c.$ and ${\chi }_{cJ(J=0,1,2)}\to \Lambda \bar{\Lambda }$
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