Observation of the decay $ψ(3686) \to Σ^-\barΣ^+$ and measurement of its angular distribution
Creators: name: BESIII Collaboration
name: Ablikim, M.
name: Achasov, M. N.
name: Adlarson, P.
name: Albrecht, M.
name: Aliberti, R.
name: Amoroso, A.
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name: Batozskaya, V.
name: Becker, D.
name: Begzsuren, K.
name: Berger, N.
name: Bertani, M.
name: Bettoni, D.
name: Bianchi, F.
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name: Briere, R. A.
name: Brueggemann, A.
name: Cai, H.
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name: Chang, J. F.
name: Chang, W. L.
name: Chelkov, G.
name: Chen, C.
name: Chen, Chao
name: Chen, G.
name: Chen, H. S.
name: Chen, M. L.
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name: Chen, T.
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name: Dong, J.
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name: Dong, X.
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name: Fang, J.
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name: Fang, W. X.
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name: Feldbauer, F.
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name: Feng, J. H.
name: Fischer, K
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name: Gao, Yang
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name: Garzia, I.
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Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using $(448.1\pm2.9)\times10^6$ $ ψ(3686)$ events collected with the BESIII detector at the BEPCII collider, the decay $ψ(3686)\toΣ^-\barΣ^+$ is observed for the first time with a branching fraction of $(2.82\pm0.04_{\rm stat.}\pm0.08_{\rm syst.})\times10^{-4}$, and the angular parameter $α_{ Σ^-}$ is measured to be $0.96\pm0.09_{\rm stat.} \pm 0.03_{\rm syst.}$.