Multi-body y' decaysBESII,PRD73,052004(2006)ModeQhBr(b(2S) - X)Br(J/b -→X)h(×10-4)(×10-4)(%)+K元元一元011.7±1.0±1.5120±289.8±2.8wK+K-14.5±3.42.38±0.37±0.2916.8 ±2.1wfo(1710), fo -→ K+K-0.59±0.20±0.096.6±1.38.9±3.8K*(892)°K-元+元0+C.C8.6±1.3±1.8K*(892)+K-元+元=+C.c9.6±2.2±1.7K*(892)°K-p+ + c.c.6.1 ± 1.3± 1.2Some modes are suppressedsome are enhanced, while someothers obey the 12% rule!11
Multi-body ’ decays BESII, PRD73, 052004 (2006) Some modes are suppressed, some are enhanced, while some others obey the 12% rule! 11
(2S)→TT,30015n(958)(2s)=m元元n(1405)20010n(1475)fi(1420)1001O(2)→S上海NTS00.600.700.900.300.400.500.800.81.01.21.41.61.82.0m(m) (GeV/c)m(m元元）（GeV/c)山(2S)b(2S)-K+K-B(→n(1405/1475)-KK)0K+-3.5+C.CLB(-fi(1420)-KK）22.5菲龙T001.201.451.201.451.701.952.201.701.952.20m(KK*元+c.c.)(GeV/c*)m(K*K元)(GeV/c)12
𝜓(2𝑆) → γηππ,𝛾𝐾𝐾LJ 𝜋 12