Precision measurements of branching fractions for ψ ′→π0J/ψ and ηj/ψ

Medina Ablikim,Mikhail N. Achasov,O. Albayrak,David J. Ambrose, F. F. An,Qi AN, J. Z. Bai,Yang Ban,Julia K. Becker,J. V. Bennett,Monica B. Bertani,J. M. Bian,E. Boger,Olga A. Bondarenko,I. R. Boyko,Roy A. Briere,Vladimir V. Bytev, X. Cai,Orhan Çakír,A. C. Calcaterra,Guofu Cao,Serkant A. Çetin,J. F. Chang,Georgy A. Chelkov,Gang Chen,Hesheng Chen,Jin Chen,M. L. Chen,S. J. Chen,Xuzong Chen,Yu Chen,H. P. Cheng,Y. P. Chu,Fabio Coccetti,Daniel P. Cronin-Hennessy,H. L. Dai,J. P. Dai,Dmitri V. Dedovich, Z. Y. Deng,Achim G. Denig,I. Denysenko,M. F. Destefanis,W. M. Ding, Y. Ding, L. Y. Dong,Mingyi Dong,S. X. Du, J. Fang,Shuangshi Fang,Luciano Fava,F. Feldbauer,Chen Feng,Rinaldo Baldini Ferroli,Chedong Fu,Jinlin Fu, Y. Gao,Chao Geng,K. Goetzen,W. X. Gong,W. Gradl,Michela Greco,M. H. Gu,Y. T. Gu,YingHui Guan,Aiqiang Guo,L. B. Guo,Yuping Guo,Y. L. Han,Frederick A. Harris,Kanglin He,Mao He,Z. Y. He,T. Held,Yuekun Heng,Z. L. Hou,H. M. Hu,Jifeng Hu, T. Hu,G. M. Huang,Guangshun Huang,Jinshu Huang,X. T. Huang,Y. P. Huang,Talib A. Hussain,Changsheng Ji,Quan Ji,Q. P. Ji,Xiaobini Ji,X. L. Ji,Long Jiang, X. S. Jiang,J. B. Jiao,Zheng Jiao,D. P. Jin,Shan Jin,F. F. Jing,Nasser Kalantar-Nayestanaki,M. O. Kavatsyuk,M. Kornicer,Wolfgang Kuehn,W. Lai,Jens Sören Lange,Chun Li, Cheng Li, Cui Li,D. M. Li, F. Li,Gang Li,Haibo Li,Jiacai Li,KaiHua Li, Lei Li,Q. J. Li,Sheng Li,W. D. Li,Wugui Li,Xianlei Li,Xiaonan Li,Xueqian Li,Xiurong Li,Zhibing Li,Hari Liang,Y. F. Liang,Y. T. Liang,G. R. Liao,X. T. Liao,Beijiang Liu,Chao Liu,C. X. Liu, Cheng Liu, F. H. Liu, Fang Liu, Feng Liu,Hongwei Liu, Huihui Liu,HuaiMin Liu, H. W. Liu,Jia Liu, Kai Liu,Peng Liu,Q. Liu,Shaobo Liu,Xiang Liu,Yubin Liu,Zhen'An Liu,Zhiqiang Liu,Zhiqing Liu,Herbert Loehner,G. R. Lu,H. J. Lu,J. G. Lu,Q. W. Lu,X. R. Lu,Yunpeng Lu,C. L. Luo,Minxing Luo, T. Luo,X. L. Luo,M. Lv,C. L. Ma,F. C. Ma,H. L. Ma,Q. M. Ma,Sixuan Ma,T. Ma,X. Y. Ma,YongJi Ma,Frank E. Maas,Marco Maggiora,Q. A. Malik,YaJund Mao,Zepu Mao,Johan G M Messchendorp,Jian Min,Tai Min,Ryan E. Mitchell,Xiaohu Mo,Cornelio Morales Morales,C. Motzko,Nikolay Yu Muchnoi,H. Muramatsu,Yu A. Nefedov,Caitriana Nicholson,Ivan B. Nikolaev,Zhe Ning,Stephen Lars Olsen,Qun Ouyang,Simone P. Pacetti,Jewook Park,M. Pelizaeus,H. P. Peng,Klaus J. Peters,Jialun Ping,Ronggang Ping,Ronald A. Poling,E. Prencipe,Ming Qi,Sen Qian,Congfeng Qiao,Xiaoshuai Qin,Y. Qin,Z. H. Qin,J. F. Qiu,K. H. Rashid,Gang Rong,Xiangdong Ruan,Andrey V. Sarantsev,B. D. Schaefer,J. Schulze,Shao Ming, C. P. Shen,X. Y. Shen,Huayi Sheng,Matthew R. Shepherd,X. Y. Song,Stefano Spataro,Björn Spruck,D. H. Sun,G. X. Sun,Jiao Sun,S. S. Sun,YongJie Sun,Yi Sun,Z. J. Sun,Z. T. Sun,Changjian Tang,X. Tang,Ilhan Tapan,Edward H. Thorndike,Derrick Toth,Matthias Ullrich,Gary S. Varner,Bing Wang,Boqun Wang,Daliang Wang,Duan Wang,Keqing Wang,Liang Wang,Lan Wang,Meng Wang,P. L. Wang,Ping Wang,Qun Wang,Q. J. Wang,Shiguang Wang,Xiaolong Wang,Yandong Wang,Yifang Wang,Yongqiang Wang,Zhe Wang,Zhigang Wang, Zheng Wang, D. H. Wei,Jiangbo Wei,P. Weidenkaff,Q. G. Wen,Shuopin Wen,Marcel W. Werner,Ulrich Wiedner,L. H. Wu,N. Wu,S. X. Wu,W. Wu,Zhonghuan Wu,L. G. Xia,Z. J. Xiao,Yuguang Xie,Q. L. Xiu,G. F. Xu,Guangming Xu,Hong Xu,Qingjun Xu,X. P. Xu,Zhirui Xu,F. Xue,Zhen Xue,Lei Yan,Wang Yan,Y. H. Yan,Hai Yang,Yadong Yang,Yongxu Yang,H. Ye,M. H. Ye,B. X. Yu,C. X. Yu,H. W. Yu,Jiesheng Yu,S. P Yu Yu,Changzheng Yuan,Yo Yuan,Abrar Ahmed Zafar,Adriano Z. Zallo,Yun Zeng,B. X. Zhang, B. Y. Zhang, C. Y. Zhang,Changchun Zhang,Dehong Zhang,Hui Zhang,Hongyu Zhang,Jian Zhang,Jiawen Zhang,Jing Zhang,S. H. Zhang,Xuan Zhang,Xueyao Zhang,Yi Zhang, Ying Zhang, Yao Zhang,Ziping Zhang,Zhenyu Zhang,Guangyuan Zhao,H. S. Zhao,Jie Zhao,K. X. Zhao,Lei Zhao,Ling Zhao,M. G. Zhao,Quiang Zhao,Q. Z. Zhao,S. J. Zhao,Tianchi Zhao,Xin Zhao,Yubin Zhao,Z. G. Zhao,Alexey S. Zhemchugov,B. Zheng,J. P. Zheng,Yanghenghtl Zheng,Bin Zhong,J. Zhong,Zhi'an Zhong,Lin Zhou,Xin Zhou,X. R. Zhou,C. Zhu,K. J. Zhu,S. H. Zhu,X. L. Zhu,Y. C. Zhu,Y. M. Zhu,Y. S. Zhu,Z. A. Zhu,J. Zhuang,Bingsong Zou,Jiaheng Zou

PHYSICAL REVIEW D（2012）

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摘要

We present a precision study of the psi' -> pi(0)J/Psi and eta J/Psi decay modes. The measurements are obtained using 106 x 10(6) psi' events accumulated with the BESIII detector at the BEPCII e(+)e(-) collider operating at a center-of-mass energy corresponding to the psi' mass. We obtain B(psi' -> pi(0)J/Psi) = (1.26 +/- 0.02(stat) +/- 0.03(syst)) x 10(-3) and B(psi' -> eta J/Psi) = (33.75 +/- 0.17(stat) +/- 0.86(syst)) x 10(-3). The branching fraction ratio R = B(psi'->pi(0)J/psi)/B(psi'->eta J/psi) is determined to be (3.74 +/- 0.06(stat) +/- 0.04(syst)) x 10(-2). The precision of these measurements of B(Psi' -> pi(0)J/Psi) and R represent a significant improvement over previously published values.

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