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A study of charged κ in J/ψ→K±KSπ∓π0

M. Ablikim, J.Z. Bai, Y. Bai, Y. Ban, X. Cai, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, X.D. Chen, Y.B. Chen (+137 others)
2010 Physics Letters B  

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2010 pre-print arXiv:1002.0893v1 fatcat:roxbuc2dlzfnndokb7omrmmmmq

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2010 accepted
arXiv:1002.0893v2 fatcat:anx7fuoupneu5l7s32qvfejhba
Based on 58 × 10^6 J/ψ events collected by BESII, the decay J/ψ→ K^± K_s π^∓π^0 is studied. In the invariant mass spectrum recoiling against the charged K^*(892)^±, the charged κ particle is found as a low mass enhancement. If a Breit-Wigner function of constant width is used to parameterize the kappa, its pole locates at (849 ± 77 ^+18_-14) -i (256 ± 40 ^+46_-22) MeV/c^2. Also in this channel, the decay J/ψ→ K^*(892)^+ K^*(892)^- is observed for the first time. Its branching ratio is (1.00 ± 0.19 ^+0.11_-0.32) × 10^-3.
doi:10.1016/j.physletb.2010.08.015 fatcat:zdgupca2kbg3zokq7tq5dwbly4
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M. Ablikim, J.Z. Bai, Y. Bai, Y. Ban, X. Cai, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, X.D. Chen, Y.B. Chen, Y.P. Chu, Y.S. Dai, Z.Y. Deng, S.X. Du, J. Fang, C.D. Fu, C.S. Gao, Y.N. Gao, S.D. Gu, Y.T. Gu, Y.N. Guo, Z.J. Guo, F.A. Harris, K.L. He, M. He, Y.K. Heng, H.M. Hu, T. Hu, G.S. Huang, X.T. Huang, Y.P. Huang, X.B. Ji, X.S. Jiang, J.B. Jiao, D.P. Jin, S. Jin, G. Li, H.B. Li, J. Li, L. Li, R.Y. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Y.F. Liang, B.J. Liu, C.X. Liu, Fang Liu, Feng Liu, H.M. Liu, J.P. Liu, H.B. Liu, J. Liu, Q. Liu, R.G. Liu, S. Liu, Z.A. Liu, F. Lu, G.R. Lu, J.G. Lu, C.L. Luo, F.C. Ma, H.L. Ma, Q.M. Ma, M.Q.A. Malik, Z.P. Mao, X.H. Mo, J. Nie, S.L. Olsen, R.G. Ping, N.D. Qi, J.F. Qiu, G. Rong, X.D. Ruan, L.Y. Shan, L. Shang, C.P. Shen, X.Y. Shen, H.Y. Sheng, H.S. Sun, S.S. Sun, Y.Z. Sun, Z.J. Sun, X. Tang, J.P. Tian, G.L. Tong, G.S. Varner, X. Wan, L. Wang, L.L. Wang, L.S. Wang, P. Wang, P.L. Wang, Y.F. Wang, Z. Wang, Z.Y. Wang, C.L. Wei, D.H. Wei, N. Wu, X.M. Xia, G.F. Xu, X.P. Xu, Y. Xu, M.L. Yan, H.X. Yang, M. Yang, Y.X. Yang, M.H. Ye, Y.X. Ye, C.X. Yu, C.Z. Yuan, Y. Yuan, Y. Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, F. Zhang, H.Q. Zhang, H.Y. Zhang, J.W. Zhang, J.Y. Zhang, X.Y. Zhang, Y.Y. Zhang, Z.X. Zhang, Z.P. Zhang, D.X. Zhao, J.W. Zhao, M.G. Zhao, P.P. Zhao, Z.G. Zhao, B. Zheng, H.Q. Zheng, J.P. Zheng, Z.P. Zheng, B. Zhong, L. Zhou, K.J. Zhu, Q.M. Zhu, X.W. Zhu, Y.S. Zhu, Z.A. Zhu, Z.L. Zhu, B.A. Zhuang, B.S. Zou. "A study of charged κ in J/ψ→K±KSπ∓π0." Physics Letters B 693.2 (2010) 88-94