Partial Wave Analysis of $J/\psi \to \gamma (K^+K^-\pi^+\pi^-)$

J. Z. Bai,Y. Ban,J. G. Bian,A. D. Chen,G. P. Chen,H. F. Chen,H. S. Chen,J. C. Chen,X. D. Chen,Y. Chen,Y. B. Chen,B. S. Cheng,X. Z. Cui,H. L. Ding,L. Y. Dong,C. S. Gao,M. L. Gao,S. Q. Gao,J. H. Gu,S. D. Gu,W. X. Gu,Y. N. Guo,Z. J. Guo,S. W. Han,Y. Han, J. He,J. T. He,K. L. He,M. He,Y. K. Heng,G. Y. Hu,H. M. Hu,J. L. Hu,Q. H. Hu,T. Hu,G. S. Huang,X. P. Huang,Y. Z. Huang,C. H. Jiang,Y. Jin,X. Ju,Z. J. Ke,Y. F. Lai,P. F. Lang,C. G. Li,D. Li,H. B. Li,J. Li,J. C. Li, P. Q. Li,W. Li,W. G. Li,X. H. Li,X. N. Li,X. Q. Li,B. Liu,F. Liu,Feng Liu,H. M. Liu,J. Liu,J. P. Liu,R. G. Liu,Y. Liu,Z. X. Liu,G. R. Lu,F. Lu,J. G. Lu,X. L. Luo,E. C. Ma,J. M. Ma,H. S. Mao,Z. P. Mao,X. C. Meng,X. H. Mo,J. Nie,N. D. Qi,X. R. Qi,C. D. Qian,J. F. Qiu,Y. H. Qu,Y. K. Que,G. Rong,Y. Y. Shao,B. W. Shen,D. L. Shen,H. Shen,H. Y. Shen,X. Y. Shen,F. Shi,H. Z. Shi,X. F. Song,H. S. Sun,L. F. Sun,Y. Z. Sun,S. Q. Tang,G. L. Tong,F. Wang,L. Wang,L. S. Wang,L. Z. Wang,P. Wang,P. L. Wang,S. M. Wang,Y. Y. Wang,Z. Y. Wang,C. L. Wei,N. Wu,Y. G. Wu,D. M. Xi,X. M. Xia,Y. Xie,Y. H. Xie,G. F. Xu,S. T. Xue,J. Yan,W. G. Yan,C. M. Yang,C. Y. Yang,H. X. Yang,X. F. Yang,M. H. Ye,S. W. Ye,Y. X. Ye, C. S. Yu,C. X. Yu,G. W. Yu,Y. H. Yu,Z. Q. Yu,C. Z. Yuan,Y. Yuan,B. Y. Zhang,C. Zhang,C. C. Zhang,D. H. Zhang,Dehong Zhang,H. L. Zhang,J. Zhang,J. W. Zhang,L. Zhang,Lei Zhang,L. S. Zhang,P. Zhang,Q. J. Zhang,S. Q. Zhang,X. Y. Zhang,Y. Y. Zhang,D. X. Zhao,H. W. Zhao,Jiawei Zhao,J. W. Zhao,M. Zhao,W. R. Zhao,Z. G. Zhao,J. P. Zheng,L. S. Zheng,Z. P. Zheng,B. Q. Zhou,L. Zhou,K. J. Zhu,Q. M. Zhu,Y. C. Zhu,Y. S. Zhu,Z. A. Zhu,B. A. Zhuang

PHYSICS LETTERS B（2000）

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Abstract

BES data on J/psi --> gamma(K+K- pi(+)pi(-)) are presented. The K* (K) over bar* contribution peaks strongly near threshold. It is fitted with a broad 0(-+) resonance with mass M = 1800 +/- 100 MeV, width Gamma = 500 +/- 200 MeV. A broad 2(++) resonance peaking at 2020 MeV is also required with width similar to 500 MeV. There is further evidence for a 2(-+) component peaking at 2.55 GeV. The non-K* (K) over bar* contribution is close to phase space; it peaks at 2.6 GeV and is very different from K * K (*) over bar. (C) 2000 Elsevier Science B.V. All rights reserved.

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Key words

partial wave analysis

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