Study Of The P-Wave Charmonium State Chi(Cj) In Psi/(2s) Decays

J. Z. Bai,J. G. Bian,I. Blum,Z. W. Chai,G. P. Chen,H. F. Chen, J. Chen, J. C. Chen,Y. Chen,Y. B. Chen,Y. Q. Chen,B. S. Cheng,X. Z. Cui,H. L. Ding,L. Y. Ding,L. Y. Dong,Z. Z. Du, W. Dunwoodie,S. Feng,C. S. Gao,M. L. Gao,S. Q. Gao,P. Gratton,J. H. Gu,S. D. Gu,W. X. Gu,Y. F. Gu,Y. N. Guo,S. W. Han,Y. Han,F. A. Harris,J. He,J. T. He,M. He,D. G. Hitlin,G. Y. Hu,H. M. Hu,J. L. Hu,Q. H. Hu, T. Hu,X. Q. Hu,J. D. Huang, Y. Z. Huang,J. M. Izen, C. H. Jiang, Y. Jin,Z. J. Ke,M. H. Kelsey,B. K. Kim,D. Kong,Y. F. Lai,P. F. Lang,A. Lankford, C. G. Li,D. Li,H. B. Li,J. Li,P. Q. Li,R. B. Li, W. Li,W. D. Li, W. G. Li,X. H. Li,X. N. Li,H. M. Liu,J. Liu,J. H. Liu,R. G. Liu,Y. Liu,X. C. Lou,B. Lowery,F. Lu,J. G. Lu,J. Y. Lu,L. C. Lu,C. H. Luo,A. M. Ma,E. C. Ma,J. M. Ma,R. Malchow,H. S. Mao,Z. P. Mao,X. C. Meng,J. Nie,S. L. Olsen,J. Oyang,D. Paluselli,L. J. Pan,J. Panetta,F. Porter,N. D. Qi,X. R. Qi,C. D. Qian,J. F. Qiu,Y. H. Qu,Y. K. Que,G. Rong, M. Schernau,Y. Y. Shao,B. W. Shen,D. L. Shen,H. Shen, X. Y. Shen,H. Y. Sheng,H. Z. Shi,X. F. Song,J. Standifird,F. Sun,H. S. Sun,S. Q. Tang,W. Toki,G. L. Tong, G. Varner, F. Wang,L. S. Wang,L. Z. Wang,M. Wang,Meng Wang,P. Wang,P. L. Wang,S. M. Wang,T. J. Wang,Y. Y. Wang,M. Weaver,C. L. Wei,Y. G. Wu,D. M. Xi,X. M. Xia,P. P. Xie,Y. Xie,Y. H. Xie,W. J. Xiong,C. C. Xu,G. F. Xu,S. T. Xue,J. Yan,W. G. Yan,C. M. Yang,C. Y. Yang,J. Yang,W. Yang,X. F. Yang,M. H. Ye,S. W. Ye,Y. X. Ye, K. Yi,C. S. Yu,C. X. Yu,Y. H. Yu,Z. Q. Yu,Z. T. Yu, C. Z. Yuan,Y. Yuan, B. Y. Zhang,C. C. Zhang,D. H. Zhang,Dehong Zhang,H. L. Zhang, J. Zhang,J. L. Zhang,J. W. Zhang,L. S. Zhang,Q. J. Zhang,S. Q. Zhang, X. Y. Zhang, Y. Zhang, Y. Y. Zhang,D. X. Zhao,H. W. Zhao,J. W. Zhao,M. Zhao,W. R. Zhao, Z. G. Zhao,J. P. Zheng,L. S. Zheng,Z. P. Zheng, G. P. Zhou,H. S. Zhou, L. Zhou, Q. M. Zhu,Y. C. Zhu,Y. S. Zhu,B. A. Zhuang

PHYSICAL REVIEW LETTERS（1998）

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摘要

The processes psi(2S) --> gamma pi(+)pi(-), gamma K+K-, and gamma p (p) over bar have been studied using a sample of 3.79 x 10(6) psi(2S) decays. We determine the total width of the chi(c0) to be Gamma(chi c0)(tot) = 14.3 +/- 2.0 +/- 3.0 MeV. We present the first measurement of the branching fraction B(chi(c0) --> p (p) over bar) = (15.9 1 4.3 i 5.3) x 10(-5) where the first error is statistical and the second one is systematic. Branching fractions of chi(c0,2) --> pi(+)pi(-) and K+K- are also reported. [S0031-9007(98)07355-4].

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p waves,particle accelerators

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