Observation of the decays $χ_{cJ}\to n K^{0}_{S}\barΛ+ c.c.$
Creators: name: BESIII Collaboration
name: Ablikim, M.
name: Achasov, M. N.
name: Adlarson, P.
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Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: By analyzing $4.48\times10^8$ $ψ(3686)$ events collected with the BESIII detector, we observe the decays $χ_{cJ} \to n K^0_S\barΛ+ c.c.$ ($J=0$, 1, 2) for the first time, via the radiative transition $ψ(3686) \to γχ_{cJ}$. The branching fractions are determined to be $(6.67 \pm 0.26_{\rm stat} \pm 0.41_{\rm syst})\times10^{-4}$, $(1.71 \pm 0.12_{\rm stat} \pm 0.12_{\rm syst})\times10^{-4}$, and $(3.66 \pm 0.17_{\rm stat} \pm 0.23_{\rm syst})\times10^{-4}$ for $J=0$, 1, and 2, respectively.
description: 10 pages, 4 figures