Observation of the decay psi(2S) ---> K*(892)anti-K + c.c.

  title={Observation of the decay psi(2S) ---> K*(892)anti-K + c.c.},
  author={Medina Ablikim and Jing-song Bai and Yue Yuan Ban and Jingyang Bian and Xiaowen Cai and Jin-fan Chang and Hongda Chen and Hesheng Chen and Hong Xing Chen and Jin Chen and Jun Chen and M.-L. Chen and Yuan Bin Chen and Samuel Chi and Yuxing Chu and Xing Cui and H. L. Dai and Y. Sophia Dai and Zhenghai Deng and Luofan Dong and Shaojiang Du and Z. Z. Du and Jian Fang and Sheng Quan Fang and Chengsong Fu and H. Y. Fu and Chong Shou Gao and Ya Ni Gao and Maxwell Gong and Weiwei Gong and Shuyao Gu and Y. N. Guo and Ying qing Guo and Zhou Guo and Frederick A. Harris and Kanglin He and Ming He and Xiaojia He and Yuekun. Heng and Hongwei Hu and Tong Hu and Guo Shu Huang and Lei Huang and Xin Ping Huang and Xiu-qing Ji and Qing Yang Jia and Chang-sheng Jiang and Xingkai Jiang and Dapeng Jin and Si Ting Jin and Yi Feng Jin and Yi Feng Lai and Fengpei Li and Guo Li and Hayley Han Li and Jin Cheng Li and Qiu-ju. Li and Runchuan Li and Ryongsu Li and S-M. Li and Wenju Li and Xiaofei Li and Xiaoli Li and Xiaosong S Li and Yong-zhi Liang and Huasheng Liao and Chengqing Liu and Fang ai Liu and H. M. Liu and Jian Bin Liu and Jinbao Liu and R. G. Liu and Zhiqing Liu and Xiaohui Liu and Fangjun Lu and Gaofeng Lu and Junguang G. Lu and Chenglin L. Luo and Xiaoxiong Luo and F Roxbury Crossing Ma and Jiming Ma and Liping Ma and Qiumei Ma and Xixiao Ma and Zhongquan Mao and Xiaodong Mo and Jiaheng Nie and Zhaoguang Nie and Stephen Lars Olsen and Hu Peng and Niting Qi and Chao Dong Qian and Huizeng Qin and Jianhang Qiu and Zhi Ying. Ren and Genlan Rong and Lim Yuh Shan and Liangliang Shang and David Shen and Xiaohuan Shen and Honglei Sheng and Fang L Shi and X. Z. Shi and Hsiao-Fang Sunny Sun and Shengnan Sun and Yuan-tian Sun and Zhengrong Sun and Xianhua Tang and Nongjian Tao and Ying Ran Tian and Geng Lei Tong and Gary S � Varner and Dan Y. Wang and Jianzhong Wang and Kelin Wang and Lin-Na Wang and Meng Fan Wang and Pengcheng Wang and Sheng Zheng Wang and Weigang Wang and Yiru Wang and Zhe Yuan Wang and Zheng Yu Wang and Chia Lin Wei and Dengyun Wei and Nannan Wu and Yue Ming Wu and Xiwen Xia and Xiao Xie and Binjian Xin and Guochuang Xu and Houchang Xu and Yan Xu and Shuyang Xue and M. L. Yan and Fang Yang and H. X. Yang and Ji-feng Yang and Seung Du Yang and Yi-ren Yang and Mei Hua Ye and Yunshang Ye and Li Hu Yi and Zheng Y Yi and Chun S. Yu and Guang Wei Yu and Cheng Zhi Yuan and J. M. Yuan and Yafei Yuan and Qing Yue and Shiming Zang and Y C Zeng and Bosong Zhang and Benjamin Yibin Zhang and Chaobo Zhang and Dehong Zhang and H. Y. Zhang and Jianqin Zhang and JP. Zhang and Luo-yu Zhang and Qing Zhang and Shi. Zhang and Xianmin Zhang and Xinming Zhang and Yinglong Joseph Zhang and Yiyun Zhang and Zhenghao Zhang and Zhengshun Zhang and D. X. Zhao and Jin Biao Zhao and Jiawei Zhao and Mengen Zhao and Pengpeng Zhao and Wusheng Zhao and Xingju Zhao and Yawei Zhao and Zhouyu Zhao and Han-qing Zheng and Jinqi Zheng and Ling Shan Zheng and Zuping Zheng and X. C. Zhong and Bowei Zhou and Guo Mo Zhou and Lijun Zhou and Nai Fu Zhou and Kejun J. Zhu and Quan Min Zhu and Yujian Zhu and Yingchun Zhu and Zian Zhu and Bingyuan Zhuang and Bing Suo Zou},
Using 14 million ψ(2S) events collected with the BESII detector, branching fractions of ψ(2S) → K(892)K+c.c. and K(892)K 0 + c.c. are determined to be: B(ψ(2S) → K(892)K + c.c.) = (2.9 −1.7 ± 0.4) × 10 −5 and B(ψ(2S) → K(892)K 0 + c.c.) = (13.3 −2.7 ± 1.7)× 10 . The results confirm the violation of the “12% rule” for these two decay channels. A large isospin violation between the charged and neutral modes is observed. 

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