Amplitude Analysis of the Decays Eta ' -> Pi(+)Pi(-)Pi(0) and Eta' -> Pi(0)Pi(0)Pi(0)

M. Ablikim,M. N. Achasov,X. C. Ai,O. Albayrak,M. Albrecht,D. J. Ambrose,A. Amoroso,F. F. An,Q. An,J. Z. Bai,R. Baldini Ferroli,Y. Ban,D. W. Bennett,J. V. Bennett,M. Bertani,D. Bettoni,J. M. Bian,F. Bianchi,E. Boger,I. Boyko,R. A. Briere,H. Cai,X. Cai,O. Cakir,A. Calcaterra,G. F. Cao,S. A. Cetin,J. F. Chang,G. Chelkov,G. Chen,H. S. Chen,H. Y. Chen,J. C. Chen, M. L. Chen,S. Chen,S. J. Chen,X. Chen,X. R. Chen,Y. B. Chen,H. P. Cheng,X. K. Chu,G. Cibinetto,H. L. Dai,J. P. Dai,A. Dbeyssi,D. Dedovich,Z. Y. Deng,A. Denig,I. Denysenko,M. Destefanis,F. De Mori,Y. Ding, C. Dong,J. Dong,L. Y. Dong,M. Y. Dong,Z. L. Dou,S. X. Du,P. F. Duan,J. Z. Fan,J. Fang,S. S. Fang,X. Fang,Y. Fang,R. Farinelli,L. Fava,O. Fedorov,F. Feldbauer,G. Felici, C. Q. Feng,E. Fioravanti,M. Fritsch,C. D. Fu, Q. Gao,X. L. Gao,X. Y. Gao,Y. Gao,Z. Gao,I. Garzia,K. Goetzen,L. Gong,W. X. Gong,W. Gradl,M. Greco, M. H. Gu,Y. T. Gu, Y. H. Guan,A. Q. Guo,L. B. Guo, R. P. Guo,Y. Guo, Y. P. Guo, Z. Haddadi,A. Hafner,S. Han,X. Q. Hao,F. A. Harris,K. L. He,T. Held,Y. K. Heng,Z. L. Hou,C. Hu,H. M. Hu,J. F. Hu,T. Hu,Y. Hu,G. S. Huang,J. S. Huang,X. T. Huang,X. Z. Huang,Y. Huang,Z. L. Huang,T. Hussain,Q. Ji,Q. P. Ji,X. B. Ji,X. L. Ji,L. W. Jiang,X. S. Jiang,X. Y. Jiang,J. B. Jiao,Z. Jiao,D. P. Jin,S. Jin,T. Johansson,A. Julin,N. Kalantar-Nayestanaki,X. L. Kang,X. S. Kang,M. Kavatsyuk,B. C. Ke, P. Kiese, R. Kliemt,B. Kloss,O. B. Kolcu,B. Kopf, M. Kornicer,A. Kupsc, W. Kuehn,J. S. Lange,M. Lara,P. Larin, C. Leng, C. Li,Cheng Li, D. M. Li, F. Li,F. Y. Li,G. Li,H. B. Li,H. J. Li,J. C. Li,Jin Li, K. Li, Lei Li,P. R. Li,Q. Y. Li,T. Li,W. D. Li,W. G. Li,X. L. Li,X. N. Li,X. Q. Li,Y. B. Li,Z. B. Li,H. Liang,Y. F. Liang,Y. T. Liang,G. R. Liao,D. X. Lin,B. Liu,B. J. Liu,C. X. Liu, D. Liu,F. H. Liu,Fang Liu, Feng Liu,H. B. Liu,H. H. Liu,H. M. Liu, J. Liu,J. B. Liu,J. P. Liu,J. Y. Liu, K. Liu,K. Y. Liu,L. D. Liu,P. L. Liu,Q. Liu,S. B. Liu,X. Liu,Y. B. Liu,Z. A. Liu,Zhiqing Liu,H. Loehner,X. C. Lou,H. J. Lu,J. G. Lu,Y. Lu,Y. P. Lu,C. L. Luo,M. X. Luo,T. Luo,X. L. Luo,X. R. Lyu,F. C. Ma,H. L. Ma,L. L. Ma,M. M. Ma,Q. M. Ma,T. Ma,X. N. Ma,X. Y. Ma,Y. M. Ma,F. E. Maas,M. Maggiora,Y. J. Mao,Z. P. Mao,S. Marcello,J. G. Messchendorp,J. Min,T. J. Min,R. E. Mitchell,X. H. Mo,Y. J. Mo, Morales,N. Yu Muchnoi, H. Muramatsu,Y. Nefedov,F. Nerling,I. B. Nikolaev,Z. Ning,S. Nisar,S. L. Niu,X. Y. Niu,S. L. Olsen,Q. Ouyang,S. Pacetti,Y. Pan,P. Patteri,M. Pelizaeus,H. P. Peng,K. Peters,J. Pettersson, J. L. Ping,R. G. Ping,R. Poling,V. Prasad,H. R. Qi,M. Qi,S. Qian,C. F. Qiao,L. Q. Qin,N. Qin,X. S. Qin,Z. H. Qin,J. F. Qiu,K. H. Rashid,C. F. Redmer,M. Ripka, G. Rong,Ch. Rosner, X. D. Ruan,A. Sarantsev,M. Savrie,K. Schoenning,S. Schumann,W. Shan,M. Shao, C. P. Shen,P. X. Shen,X. Y. Shen,H. Y. Sheng,M. Shi,W. M. Song,X. Y. Song,S. Sosio,S. Spataro,G. X. Sun, J. F. Sun,S. S. Sun,X. H. Sun, Y. J. Sun,Y. Z. Sun,Z. J. Sun,Z. T. Sun,C. J. Tang,X. Tang,I. Tapan,E. H. Thorndike,M. Tiemens,M. Ullrich,I. Uman,G. S. Varner, B. Wang, B. L. Wang, D. Wang,D. Y. Wang,K. Wang, L. L. Wang, L. S. Wang, M. Wang,P. Wang,P. L. Wang,W. Wang,W. P. Wang, X. F. Wang,Y. Wang,Y. D. Wang,Y. F. Wang,Y. Q. Wang,Z. Wang,Z. G. Wang,Z. H. Wang,Z. Y. Wang,T. Weber,D. H. Wei, P. Weidenkaff,S. P. Wen,U. Wiedner,M. Wolke,L. H. Wu,L. J. Wu,Z. Wu,L. Xia,L. G. Xia,Y. Xia,D. Xiao,H. Xiao,Z. J. Xiao,Y. G. Xie, Q. L. Xiu,G. F. Xu, J. J. Xu,L. Xu, Q. J. Xu, Q. N. Xu,X. P. Xu,L. Yan,W. B. Yan,W. C. Yan,Y. H. Yan, H. J. Yang,H. X. Yang,L. Yang,Y. X. Yang,M. Ye,M. H. Ye,J. H. Yin,B. X. Yu,C. X. Yu,J. S. Yu,C. Z. Yuan,W. L. Yuan,Y. Yuan,A. Yuncu,A. A. Zafar,A. Zallo, Y. Zeng,Z. Zeng, B. X. Zhang,B. Y. Zhang,C. Zhang,C. C. Zhang, D. H. Zhang, H. H. Zhang,H. Y. Zhang,J. Zhang,J. J. Zhang,J. L. Zhang,J. Q. Zhang,J. W. Zhang,J. Y. Zhang,J. Z. Zhang,K. Zhang, L. Zhang,S. Q. Zhang,X. Y. Zhang,Y. Zhang,Y. H. Zhang,Y. N. Zhang,Y. T. Zhang,Yu Zhang,Z. H. Zhang,Z. P. Zhang,Z. Y. Zhang,G. Zhao,J. W. Zhao,J. Y. Zhao,J. Z. Zhao,Lei Zhao,Ling Zhao,M. G. Zhao,Q. Zhao,Q. W. Zhao,S. J. Zhao,T. C. Zhao,Y. B. Zhao,Z. G. Zhao,A. Zhemchugov,B. Zheng,J. P. Zheng,W. J. Zheng,Y. H. Zheng,B. Zhong,L. Zhou,X. Zhou,X. K. Zhou,X. R. Zhou,X. Y. Zhou,K. Zhu,K. J. Zhu,S. Zhu,S. H. Zhu,X. L. Zhu,Y. C. Zhu,Y. S. Zhu,Z. A. Zhu,J. Zhuang,L. Zotti,B. S. Zou,J. H. Zou

Physical review letters（2017）

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摘要

Based on a sample of 1.31 x 10(9) J/Psi events collected with the BESIII detector, an amplitude analysis of the isospin-violating decays eta' -> pi(+)pi(-)pi(0) and eta' -> pi(0)pi(0)pi(0) is performed. A significant P-wave contribution from eta' -> rho(+/-)eta(-/+) is observed for the first time in eta' -> pi(+)pi(-)pi(0). The branching fraction is determined to be B(eta' -> rho(+/-)pi(-/+)) = (7.44 +/- 0.60 +/- 1.26 +/- 1.84) x 10(-4), where the first uncertainty is statistical, the second systematic, and the third model dependent. In addition to the nonresonant S-wave component, there is a significant sigma meson component. The branching fractions of the combined S-wave components are determined to be B(eta' -> pi(+)pi(-)pi(0))(S) = (37.63 +/- 0.77 +/- 2.22 +/- 4.48) x 10(-4) and B(eta' -> pi(0)pi(0)pi(0)) = (35.22 +/- 0.82 +/- 2.54) x 10(-4), respectively. The latter one is consistent with previous BESIII measurements.

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