First observations of ψ(2S)ψ(2S) and χcJ(1P)χcJ(1P) decays to four-body final states h+h−KS0KS0☆ M Ablikim , J Z Bai , Y Ban , J G Bian , Xiaoyan Cai , J F Chang , H S Chen , J C Chen , M L Chen , Y B Chen , S P Chi , Y P Chu , X Z Cui , H L Dai , Y S Dai , Z Y Deng , L Y Dong , S X Du , Z Z Du , Junnan Fang , S S Fang , C D Fu , H Y Fu , C S Gao , Y N Gao , M Y Gong , W X Gong , S D Gu , Y Q Guo , Z J Guo , F A Harris , K L He , M He , Xiaobin He , Y K Heng , H M Hu , Ting Hu , G S Huang , Luosheng Huang , X P Huang , X B Ji , Q Y Jia , C H Jiang , X S Jiang , D P Jin , S Jin , Yongtang Jin , Y F Lai , Feifei Li , Ge Li , H H Li , J C Li , Q J Li , R Y Li , S M Li , W G Li , X Q Li , Y F Liang , H B Liao , C X Liu , Fang Liu , H M Liu , J B Liu , R G Liu , Z A Liu , Feng Lu , G R Lu , J G Lu , C L Luo , X L Luo , F C Ma , J M Ma , L L Ma , Q M Ma , X Y Ma , Z P Mao , X H Mo , Jing Nie , Z D Nie , S L Olsen , H P Peng , N D Qi , C D Qian , Hailin Qin , J F Qiu , Z Y Ren , G Rong , L Y Shan , L Shang , D L Shen , X Y Shen , H Y Sheng , Fazhan Shi , Xin Shi , H S Sun , S S Sun , Y Z Sun , Z J Sun , X Tang , N Tao , Y R Tian , G L Tong , G Varner , D Y Wang , J Z Wang , Kaian Wang , L S Wang , Mingming Wang , P L Wang , S Z Wang , W F Wang , Y F Wang , Z Y Wang , C L Wei , D H Wei , N Wu , Y M Wu , X M Xia , X X Xie , B Xin , G F Xu , Hong Xu , Yanping Xu , S T Xue , M L Yan , Fan Yang , H X Yang , Jian Yang , S D Yang , Y X Yang , M H Ye , Y X Ye , L H Yi , Z Y Yi , C S Yu , G W Yu , C Z Yuan , J M Yuan , Yun Yuan , Q Yue , S L Zang , Y Zeng , B X Zhang , C C Zhang , D H Zhang , H Y Zhang , J W Zhang , L S Zhang , Q J Zhang , S Q Zhang , Xiao Ming Zhang , Y Y Zhang , Z Q Zhang , D X Zhao , J W Zhao , M G Zhao , P P Zhao , W R Zhao , X J Zhao , Y B Zhao , Z G Zhao , H Q Zheng , J P Zheng , L S Zheng , Z P Zheng , X C Zhong , B Q Zhou , G M Zhou , Lei Zhou , N F Zhou , K J Zhu , Q M Zhu , Y S Zhu , Z A Zhu , B A Zhuang , B S Zou Physics Letters B（2005）
摘要
First observations of χc0, χc1, and χc2 decays to π+π−KS0KS0 and K+K−KS0KS0, as well as ψ(2S) decay to π+π−KS0KS0, are presented. The branching fractions of these decay channels are determined using 14×106 ψ(2S) events collected at BESII/BEPC. The branching fractions of χc0,χc2→KS0KS0 are measured with improved statistical precision.
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13.25.Gv, 12.38.Qk, 14.40.Gx
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