Portal de Periódicos da CAPES

The σ pole in J/ ψ→ ωπ + π −

2004; Cornell University; Volume: 598; Linguagem: Inglês

F. De Mori, J.Z. Bai, Y. Ban, J. G. Bian, D.V. Bugg, X. Cai, J. F. Chang, H.F. Chen, H.S. Chen, H.X. Chen, Juan Chen, Jin Chen, Jun Chen, M.L. Chen, Yuanbo Chen, S.P. Chi, Y. P. Chu, X. Z. Cui, H. L. Dai, Y.S. Dai, Z. Y. Deng, L. Y. Dong, S. X. Du, Z. Z. Du, J. Fang, S. S. Fang, C. D. Fu, H. Y. Fu, C. S. Gao, Y. N. Gao, Ming Gong, W. X. Gong, S. Gu, Y.N. Guo, Yi-Qing Guo, Z. J. Guo, F. A. Harris, K. L. He, M. He, Xiao-Gang He, Y. K. Heng, H. M. Hu, T. Hu, G. S. Huang, L. Q. Huang, X. P. Huang, X. B. Ji, Qing Jia, C. H. Jiang, X. S. Jiang, D. P. Jin, S. Jin, Y. Jin, Y. F. Lai, F. Li, Gang Li, Huangshuai Li, J. Li, Jun Li, Q.J. Li, Rongsheng Li, R.Y. Li, S.M. Li, W.G. Li, X.L. Li, X.Q. Li, X.S. Li, Y. F. Liang, H. Liao, C.X. Liu, F. Liu, Fang Liu, H.M. Liu, J.B. Liu, J.P. Liu, R.G. Liu, Z.A. Liu, Z.X. Liu, F. X. Lu, G. R. Lu, J. G. Lu, C. L. Luo, X. L. Luo, F. C. Ma, J.M. Ma, L.L. Ma, Qiang Ma, X. Y. Ma, Z. P. Mao, X. H. Mo, J. Nie, Z. D. Nie, S. L. Olsen, H. P. Peng, N. D. Qi, C. D. Qian, H. Qin, Tianyu Ruan, J. F. Qiu, Z. Y. Ren, G. Rong, L. Y. Shan, L. Shang, D. L. Shen, X. Y. Shen, H. Y. Sheng, F. Shi, X. Shi, H. Sun, S. S. Sun, Yao Sun, Z. J. Sun, X. Tang, Tao Ning, Yang Tian, G. Tong, G. Varner, D. Wang, J.Z. Wang, K. Wang, L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, S.Z. Wang, W.F. Wang, Y. F. Wang, Zhe Wang, Z. Wang, Zheng Wang, Zhaofeng Wang, C.L. Wei, D. H. Wei, Nengyou Wu, Y. M. Wu, X. M. Xia, X. X. Xie, B. Xin, G. F. Xu, H. Eric Xu, Y. C. Xu, S. Xue, M. L. Yan, F. Yang, H. X. Yang, J. Yang, Shuo Yang, Y. Yang, M. Ye, M.H. Ye, Y.X. Ye, L. H. Yi, Z. Y. Yi, Yu Chen, G. Yu, C. Z. Yuan, J. M. Yuan, Y. Yuan, Q. Yue, S. L. Zang, Yu Zeng, Y. Zeng, B.X. Zhang, Boqiang Zhang, C.C. Zhang, D.H. Zhang, H.Y. Zhang, J. Zhang, J.Y. Zhang, J.W. Zhang, L.S. Zhang, Q.J. Zhang, S.Q. Zhang, X.M. Zhang, X.Y. Zhang, Yujia Zhang, Y.Y. Zhang, Yiyun Zhang, Z.P. Zhang, Z.Q. Zhang, Dongxu Zhao, Jiayi Zhao, J. W. Zhao, M. G. Zhao, P. P. Zhao, W. R. Zhao, Xinli Zhao, Y. B. Zhao, Z. Zhao, H.Q. Zheng, J. P. Zheng, L. S. Zheng, Z.P. Zheng, X. Zhong, B. Q. Zhou, G. M. Zhou, Li Zhou, Nathalie Zhou, Kejun Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Yingchun Zhu, Z. A. Zhu, B. A. Zhuang, B. S. Zou,

High-Energy Particle Collisions Research

Abstract Using a sample of 58 million J / ψ events recorded in the BESII detector, the decay J / ψ → ω π + π − is studied. There are conspicuous ω f 2 ( 1270 ) and b 1 ( 1235 ) π signals. At low ππ mass, a large, broad peak due to the σ is observed, and its pole position is determined to be ( 541 ± 39 ) − i ( 252 ± 42 ) MeV from the mean of six analyses. The errors, which are dominated by the systematic errors, cover the statistical and systematic errors in the six analyses, as well as the observed variation of the six analyses.