Measurement of ${\chi }_{cJ}$ decaying into $p\bar{n}{\pi }^{-}$ and $p\bar{n}{\pi }^{-}{\pi }^0$

Abstract

Using a data sample of $1.06\times 10^8$ $\psip$ events collected with the BESIII detector in 2009, the branching fractions of ${\chi }_{cJ}\to p\bar{n}{\pi }^{-}$ and ${\chi }_{cJ}\to p\bar{n}{\pi }^{-}{\pi }^0$ ($J$=0,1,2) are measured{Throughout the text, inclusion of charge conjugate modes is implied if not stated otherwise.}. The results for ${\chi }_{c0}\to p\bar{n}{\pi }^{-}$ and ${\chi }_{c2}\to p\bar{n}{\pi }^{-}$ are consistent with, but much more precise than those of previous measurements. The decays of ${\chi }_{c1}\to p\bar{n}{\pi }^{-}$ and ${\chi }_{cJ}\to p\bar{n}{\pi }^{-}{\pi }^0$ are observed for the first time.

References in corpus (5)

• Design and Construction of the BESIII Detector
• Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη
• Study of psi(2S) Decays to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} and Search for p bar{p} Threshold Enhancements
• Study of the decay mechanism for B+ to p pbar K+ and B+ to p pbar pi+
• First observation of $\psi (2S)\to p\bar{n}{\pi }^{-}+c.c.$

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• Evidence for ${\eta }_c$(2S)$\to\pipieta$ decay
• Enhancement near the $\bar{p}\Lambda$ threshold in the ${\chi }_{c0}\to \bar{p}{K}^{+}\Lambda$ reaction
• Observation of ${\chi }_{cJ}\to \Lambda \bar{\Lambda }\eta$
• Observation of ${\chi }_{cJ}\to 4K_S^0$
• Observation of ${\chi }_{cJ}\to p\bar{p}{K}_S^0{K}^{-}{\pi }^{+}+c.c.$