Observation Of A Broad 1(--) Resonant Structure Around 1.5 Gev/C(2) In The K+K- Mass Spectrum In J/Psi -> K+K-Pi(0)

M. Ablikim,J. Bai, Y. Ban, X. Cai,H. Chen,J. Chen,Jin Chen, Y. Chen,S. Chi,Y. Chu,X. Cui,Y. Dai,Z. Deng, L. Dong,Q. Dong,S. Du,Z. Du, J. Fang,S. Fang, C. Fu,C. Gao, Y. Gao,S. Gu, Y. Gu, Y. Guo, Z. Guo,F. Harris, K. He, M. He, Y. Heng,H. Hu, T. Hu, G. Huang,X. Huang,X. Ji,X. Jiang,J. Jiao,D. Jin, S. Jin,Yi Jin, Y. Lai, G. Li, H. Li, J. Li, R. Li, S. Li, W. Li, X. Li, Y. Li, Y. Liang,H. Liao, C. Liu, F. Liu, Fang Liu,H. Liu,J. Liu,R. Liu,Z. Liu,F. Lu,G. Lu, H. Lu,J. Lu,C. Luo,F. Ma,H. Ma,L. Ma,Q. Ma,X. Ma,Z. Mao, X. Mo, J. Nie,S. Olsen,H. Peng,N. Qi, H. Qin, J. Qiu,Z. Ren,G. Rong,L. Shan,L. Shang,D. Shen,X. Shen, H. Sheng,F. Shi,X. Shi,H. Sun,J. Sun,S. Sun,Y. Sun,Z. Sun,Z. Tan, X. Tang,Y. Tian,G. Tong, G. Varner, D. Wang, L. Wang,M. Wang, P. Wang, W. Wang,Y. Wang, Z. Wang, Zhe Wang, Zheng Wang,C. Wei,D. Wei,N. Wu,X. Xia,X. Xie,B. Xin,G. Xu, Y. Xu, M. Yan,F. Yang,H. Yang,J. Yang, Y. Yang,M. Ye,Y. Ye,Z. Yi, G. Yu,C. Yuan, J. Yuan,Y. Yuan,S. Zang, Y. Zeng,Yu Zeng,B. Zhang, C. Zhang,D. Zhang, H. Zhang,J. Zhang,Q. Zhang,X. Zhang,Y. Zhang,Z. Zhang, D. Zhao,J. Zhao,M. Zhao,P. Zhao, W. Zhao,Z. Zhao, H. Zheng,J. Zheng,Z. Zheng, L. Zhou,N. Zhou, K. Zhu, Q. Zhu, Y. Zhu,Yingchun Zhu,Y. Zhu, Z. Zhu,B. Zhuang,X. Zhuang,B. Zou

PHYSICAL REVIEW LETTERS（2006）

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摘要

A broad peak is observed at low K+K- invariant mass in J/psi -> K+K- pi(0) decays found in a sample of 5.8 x 10(7) J/psi events collected with the BESII detector. The statistical significance of the broad resonance is much larger than 5 sigma. A partial wave analysis shows that the J(PC) of this structure is 1(--). Its pole position is determined to be [1576(-55)(+49)(stat)(-91)(+98)(syst)] MeV/c(2)-i/2[818(-23)(+22)(stat)(-133)(+64)(syst)] MeV/c(2). These parameters are not compatible with any known meson resonances.

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