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

Abstract

Using 448.1 $\times$ $10^6$ $\psi (3686)$ events collected with the BESIII detector at BEPCII, we employ a single-baryon tagging technique to make the first observation of $\psi (3686)\to \Xi (1530{)}^{-}\bar{\Xi }(1530{)}^{+}$ and $\Xi (1530{)}^{-}{\bar{\Xi }}^{+}$ decays with a statistical significance of more than 10$\sigma$ and 5.0$\sigma$, respectively. The branching fractions are measured to be $\mathcal{B}$$[\psi (3686)\to \Xi (1530{)}^{-}\bar{\Xi }(1530{)}^{+}]$ = (11.45 $\pm$ 0.40 $\pm$ 0.59) $\times$ $10^{-5}$ and $\mathcal{B}$$[\psi (3686)\to \Xi (1530{)}^{-}{\bar{\Xi }}^{+}]$ = (0.70 $\pm$ 0.11 $\pm$ 0.04) $\times$ $10^{-5}$. The angular distribution parameter for $\psi (3686)\to \Xi (1530{)}^{-}\bar{\Xi }(1530{)}^{+}$ is determined to be $\alpha$ = 0.40 $\pm$ 0.24 $\pm$ 0.06, which agrees with the theoretical predictions within 1$\sigma$. The first uncertainties are statistical, and the second systematic.

arXiv comment8 pages, 8 figures, Consistent with paper published in Phys. Rev. D 100, 051101(R) (2019)

References in corpus (17)

• 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
• Polarization and Entanglement in Baryon-Antibaryon Pair Production in Electron-Positron Annihilation
• Determination of the number of $\psi (3686)$ events at BESIII
• Study of $J/\psi$ and $\psi (3686)$ decay to $\Lambda \bar{\Lambda }$ and ${\Sigma }^0{\bar{\Sigma }}^0$ final states
• Study of $J/\psi$ and $\psi (3686)\to \Sigma (1385{)}^0\bar{\Sigma }(1385{)}^0$ and ${\Xi }^0{\bar{\Xi }}^0$
• Study of $\psi$ decays to the ${\Xi }^{-}{\bar{\Xi }}^{+}$ and $\Sigma (1385{)}^{\mp }\bar{\Sigma }(1385{)}^{\pm }$ final states
• Study of J/psi decays to Lambda Lambdabar and Sigma0 Sigma0bar
• Measurements of psi(2S) decays to octet baryon-antibaryon pairs
• Measurements of J/psi --> p \bar{p}
• Measurements of Baryon Pair Decays of ${\chi }_{cJ}$ Mesons
• Mass corrections in $J/\psi \to B\bar{B}$ decay and the role of distribution amplitudes
• Measurement of the angular distribution in $\bar{p}p\to \psi (2S)\to e^{+}{e}^{-}$
• Observation of $\psi (3686)\to n\bar{n}$ and improved measurement of $\psi (3686)\to p\bar{p}$
• Helicity Amplitude Analysis of $J/\psi$ and $\psi (2S)\to \Xi (1530)\bar{\Xi }(1530)$
• Rescattering effects of baryon and antibaryon in heavy quarkonium decays

Cited by in corpus (18)

• Measurement of the cross section for $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ and observation of an excited $\Xi$ baryon
• Measurement of cross-section for $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ near threshold at BESIII
• Measurement of cross section for $e^{+}{e}^{-}\to {\Xi }^0{\bar{\Xi }}^0$ near threshold
• Measurement of the cross section for $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$ and evidence of the decay $\psi (3770)\to \Lambda \bar{\Lambda }$
• Observation of ${\Xi }^{-}$ Hyperon Transverse Polarization in $\psi (3686)\to {\Xi }^{-}{\bar{\Xi }}^{+}$
• Spectroscopic Investigation of Light Strange S=-1 $\Lambda$, $\Sigma$ and S=-2 $\Xi$ Baryons
• Measurement of $\Lambda$ baryon polarization in $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$ at $\sqrt{s}=3.773$ GeV
• 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
• Measurements of the branching fractions of $\psi (3686)\to {\bar{\Sigma }}^0\Lambda +c.c.$ and ${\chi }_{cJ(J=0,1,2)}\to \Lambda \bar{\Lambda }$
• Production and decay of hyperons in a transversely polarized electron-positron collider
• Observation of $\psi (3686)\to \Xi (1530{)}^0\bar{\Xi }(1530{)}^0$ and $\Xi (1530{)}^0{\bar{\Xi }}^0$
• Measurement of {\boldmath $J/\psi \to \Xi (1530{)}^{-}{\bar{\Xi }}^{+}$} and evidence for the radiative decay {\boldmath $\Xi (1530{)}^{-}\to \gamma {\Xi }^{-}$}
• Symmetry analysis of charmonium two-body decay
• Measurement of Born cross section of $e^{+}{e}^{-}\to {\Sigma }^0{\bar{\Sigma }}^0$ at $\sqrt{s}=3.50-4.95$ GeV
• Study of the decay ψ(3686) \to Σ^{0}\barΣ^{0}ϕ
• Observation of $\Xi (1530{)}^0$ Polarization and Determination of Its Electric and Magnetic Moments in $\psi (3686)\to \Xi (1530{)}^0\bar{\Xi }(1530{)}^0$