Observation of $ψ(3686)\rightarrowΞ(1530)^{-}\barΞ(1530)^{+}$ and $Ξ(1530)^{-}\barΞ^{+}$
Creators: name: BESIII Collaboration
name: Ablikim, M.
name: Achasov, M. N.
name: Adlarson, P.
name: Ahmed, S.
name: Albrecht, M.
name: Alekseev, M.
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name: Bennett, J. V.
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name: Bertani, M.
name: Bettoni, D.
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name: Bloms, J.
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name: Cheng, W.
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name: Cossio, F.
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name: Farinelli, R.
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name: Feldbauer, F.
name: Felici, G.
name: Feng, C. Q.
name: Fritsch, M.
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name: Garzia, I.
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name: Zhang, S. F.
name: Zhang, T. J.
name: Zhang, X. Y.
name: Zhang, Y.
name: Zhang, Y. H.
name: Zhang, Y. T.
name: Zhang, Yang
name: Zhang, Yao
name: Zhang, Yi
name: Zhang, Yu
name: Zhang, Z. H.
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name: Zhang, Z. Y.
name: Zhao, G.
name: Zhao, J. W.
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name: Zhao, Ling
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name: Zhou, X. R.
name: Zhou, Xiaoyu
name: Zhou, Xu
name: Zhu, A. N.
name: Zhu, J.
name: Zhu, J.
name: Zhu, K.
name: Zhu, K. J.
name: Zhu, S. H.
name: Zhu, W. J.
name: Zhu, X. L.
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Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using 448.1 $\times$ $10^{6}$ $ψ(3686)$ events collected with the BESIII detector at BEPCII, we employ a single-baryon tagging technique to make the first observation of $ψ(3686)\rightarrowΞ(1530)^{-}\barΞ(1530)^{+}$ and $Ξ(1530)^{-}\barΞ^{+}$ decays with a statistical significance of more than 10$σ$ and 5.0$σ$, respectively. The branching fractions are measured to be $\cal{B}$$[ψ(3686)\rightarrowΞ(1530)^{-}\barΞ(1530)^{+}] $ = (11.45 $\pm$ 0.40 $\pm$ 0.59) $\times$ $10^{-5}$ and $\cal{B}$$[ψ(3686)\rightarrowΞ(1530)^{-}\barΞ^{+}]$ = (0.70 $\pm$ 0.11 $\pm$ 0.04) $\times$ $10^{-5}$. The angular distribution parameter for $ψ(3686)\rightarrowΞ(1530)^{-}\barΞ(1530)^{+}$ is determined to be $α$ = 0.40 $\pm$ 0.24 $\pm$ 0.06, which agrees with the theoretical predictions within 1$σ$. The first uncertainties are statistical, and the second systematic.
description: 8 pages, 8 figures, Consistent with paper published in Phys. Rev. D 100, 051101(R) (2019)