Measurements of ψ(2S) decays to octet baryon–antibaryon pairs

• DOI: 10.1016/j.physletb.2007.02.029
• Publication Date: 2007-02-21T12:16:36Z
• Authors: M. Ablikim; J.Z. Bai; Y. Ban; X. Cai; H.F. Chen; H.S. Chen; H.X. Chen; J.C. Chen; Jin Chen; Y.B. Chen; Y.P. Chu; Y.S. Dai; L.Y. Diao; Z.Y. Deng; Q.F. Dong; S.X. Du; J. Fang; S.S. 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; J. Hou; H.M. Hu; J.H. Hu; T. Hu; X.T. Huang; X.B. Ji; X.S. Jiang; X.Y. Jiang; J.B. Jiao; D.P. Jin; S. Jin; Y.F. Lai; G. Li; H.B. Li; J. Li; R.Y. Li; S.M. Li; W.D. Li; W.G. Li; X.L. Li; X.N. Li; X.Q. Li; Y.F. Liang; H.B. Liao; B.J. Liu; C.X. Liu; F. Liu; Fang Liu; H.H. Liu; H.M. Liu; J. Liu; J.B. Liu; J.P. Liu; Jian Liu; Q. Liu; R.G. Liu; Z.A. Liu; Y.C. Lou; F. Lu; G.R. Lu; J.G. Lu; C.L. Luo; F.C. Ma; H.L. Ma; L.L. Ma; Q.M. Ma; Z.P. Mao; X.H. Mo; J. Nie; S.L. Olsen; R.G. Ping; N.D. Qi; H. Qin; J.F. Qiu; Z.Y. Ren; G. Rong; X.D. Ruan; L.Y. Shan; L. Shang; C.P. Shen; D.L. Shen; X.Y. Shen; H.Y. Sheng; H.S. Sun; S.S. Sun; Y.Z. Sun; Z.J. Sun; X. Tang; G.L. Tong; G.S. Varner; D.Y. Wang; L. Wang; L.L. Wang; L.S. Wang; M. Wang; P. Wang; P.L. Wang; Y.F. Wang; Z. Wang; Z.Y. Wang; Zheng Wang; C.L. Wei; D.H. Wei; U. Wiedner; Y. Weng; N. Wu; X.M. Xia; X.X. Xie; G.F. Xu; X.P. Xu; Y. Xu; M.L. Yan; H.X. Yang; Y.X. Yang; M.H. Ye; Y.X. Ye; G.W. Yu; C.Z. Yuan; Y. Yuan; S.L. Zang; Y. Zeng; B.X. Zhang; B.Y. Zhang; C.C. Zhang; D.H. Zhang; H.Q. Zhang; H.Y. Zhang; J.W. Zhang; J.Y. Zhang; S.H. Zhang; X.Y. Zhang; Yiyun Zhang; Z.X. Zhang; Z.P. Zhang; D.X. Zhao; J.W. Zhao; M.G. Zhao; P.P. Zhao; W.R. Zhao; Z.G. Zhao; H.Q. Zheng; J.P. Zheng; Z.P. Zheng; L. Zhou; K.J. Zhu; Q.M. Zhu; Y.C. Zhu; Y.S. Zhu; Z.A. Zhu; B.A. Zhuang; X.A. Zhuang; B.S. Zou
• Keywords: High Energy Physics - Experiment (hep-ex); 0103 physical sciences; FOS: Physical sciences; 7. Clean energy; 01 natural sciences; High Energy Physics - Experiment

With a sample of 14 million psi(2S) events collected by the BESII detector at Beijing Electron Positron Collider (BEPC), decay channels psi(2S)->p p-bar, Lambda Lambda-bar, Sigma0 Sigma0-bar, Xi Xi-bar are measured, and their branching ratios determined to be (3.36+-0.09+-0.24)*10E-4, (3.39+-0.20+-0.32)*10E-4, (2.35+-0.36+-0.32)*10E-4, (3.03+-0.40+-0.32)*10E-4, respectively. In angular distribution parameter alpha is 0.82+-0.17+-0.04.