The decays of J/ψ and ψ(2S) to nKS0Λ¯+c.c. are observed and measured for the first time, and the perturbative QCD “12%” rule is tested, based on 5.8×107 J/ψ and 1.4×107 ψ(2S) events collected with BESII detector at the Beijing Electron–Positron Collider. No obvious enhancement near nΛ¯ threshold in J/ψ→nKS0Λ¯+c.c. is observed, and the upper limit on the branching...
