Measurement of the branching fractions for J/ψ→p¯pη and p¯pη′

Measurement of the branching fractions for J/ψ→p¯pη and p¯pη′

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,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,BES Collaboration;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;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;BES Collaboration;
physics letters b 2009 Vol. 676 pp. 25-30
125
collaboration2009physicsmeasurement

Abstract

Using 58×106 J/ψ events collected with the Beijing Spectrometer (BESII) at the Beijing Electron Positron Collider (BEPC), the branching fractions of J/ψ to pp¯η and pp¯η′ are determined. The ratio Γ(J/ψ→pp¯η)Γ(J/ψ→pp¯) obtained by this analysis agrees with expectations based on soft-pion theorem calculations.

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273369
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10.1016/j.physletb.2009.04.066
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