Study of the processes ${\chi }_{cJ}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ and ${\Xi }^0{\bar{\Xi }}^0$

Abstract

Using $448.1\times 10^6$ $\psi (3686)$ decays collected with the BESIII detector at the BEPCII $e^{+}{e}^{-}$ storage rings, the branching fractions and angular distributions of the decays ${\chi }_{cJ}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ and ${\Xi }^0{\bar{\Xi }}^0$ $(J=0,1,2)$ are measured based on a partial-reconstruction technique. The decays ${\chi }_{c1}\to {\Xi }^0{\bar{\Xi }}^0$ and ${\chi }_{c2}\to {\Xi }^0{\bar{\Xi }}^0$ are observed for the first time with statistical significances of 7$\sigma$ and 15$\sigma$, respectively. The results of this analysis are in good agreement with previous measurements and have significantly improved precision.

arXiv comment10 pages, 3 figures, 4 tables, consistent with the publication in JHEP06(2022)074

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Cited by in corpus (4)

• First simultaneous measurement of ${\Xi }^0$ and ${\bar{\Xi }}^0$ asymmetry parameters in $\psi (3686)$ decay
• Study of $e^{+}{e}^{-}\to {\Omega }^{-}{\bar{\Omega }}^{+}$ at center-of-mass energies from 3.49 to 3.67 GeV
• Measurement of the cross section of $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ at center-of-mass energies between 3.510 and 4.843 GeV
• Measurement of Born cross section of $e^{+}{e}^{-}\to {\Sigma }^0{\bar{\Sigma }}^0$ at $\sqrt{s}=3.50-4.95$ GeV