Observation of the $χ_{cJ}$ decays into $pK^{-}\barΛη+\mathrm{c.c.}$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson et autres
By analyzing $(2712.4 \pm 14.3) \times 10^{6}$ $ψ(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decays $χ_{cJ} \to pK^{-}\barΛη+ \mathrm{c.c.}$ ($J=0,1,2$) are observed for the first time, with statistical significances exceeding $5σ$ for all three $χ_{cJ}$ states. …
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