Observation of $\psi (3686)\to \Xi (1530{)}^0\bar{\Xi }(1530{)}^0$ and $\Xi (1530{)}^0{\bar{\Xi }}^0$

Abstract

Using $(448.1\pm 2.9)\times 10^6$ $\psi (3686)$ events collected with the BESIII detector and a single-baryon tagging technique, we present the first observation of the decays $\psi (3686)\to \Xi (1530{)}^0\bar{\Xi }(1530{)}^0$ and $\Xi (1530{)}^0{\bar{\Xi }}^0$. The branching fractions are measured to be $\mathcal{B}(\psi (3686)\to \Xi (1530{)}^0\bar{\Xi }(1530{)}^0)=(6.77\pm 0.14\pm 0.39)\times 10^{-5}$ and $\mathcal{B}(\psi (3686)\to \Xi (1530{)}^0{\bar{\Xi }}^0)=(0.53\pm 0.04\pm 0.03)\times 10^{-5}$. Here, the first and second uncertainties are statistical and systematic, respectively. In addition, the parameter associated with the angular distribution for the decay $\psi (3686)\to \Xi (1530{)}^0\bar{\Xi }(1530{)}^0$ is determined to be $\alpha =0.32\pm 0.19\pm 0.07$, in agreement with theoretical predictions within one standard deviation.

10 pages, 5 figures

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Cited by in corpus (5)

• 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
• Symmetry analysis of charmonium two-body decay
• Observation of $\Xi (1530{)}^0$ Polarization and Determination of Its Electric and Magnetic Moments in $\psi (3686)\to \Xi (1530{)}^0\bar{\Xi }(1530{)}^0$