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Observation of the Helicity-Selection-Rule Suppressed Decay of the χ(c2) Charmonium State
(Amer Physical Soc, 2018-10-01)
The decays of χ(c2) → K⁺K⁻ π⁰, K(S)K(±)π(∓), and π⁺π⁻π⁰ are studied with the ψ(3686) data samples collected with the Beijing Spectrometer ( BESIII). For the first time, the branching fractions of χ(c2) → K*K̅, χ(c2) → ...