Observation Of Eta(C) Decay Into Sigma(+)(Sigma)Over-Bar(-) And (Sic)(-)((Sic))Over Bar (+) Final States

M. Ablikim,M. N. Achasov,O. Albayrak,D. J. Ambrose,F. F. An,Q. An,J. Z. Bai,Y. Ban,J. Becker,J. V. Bennett,M. Bertani,J. M. Bian,E. Boger,O. Bondarenko,I. Boyko,R. A. Briere,V. Bytev,X. Cai,O. Cakir,A. Calcaterra,G. F. Cao,S. A. Cetin,J. F. Chang,G. Chelkov,G. Chen,H. S. Chen,J. C. Chen,M. L. Chen,S. J. Chen,X. Chen,Y. B. Chen,H. P. Cheng,Y. P. Chu,F. Coccetti,D. Cronin-Hennessy,H. L. Dai,J. P. Dai,D. Dedovich,Z. Y. Deng,A. Denig,I. Denysenko,M. Destefanis,W. M. Ding,Y. Ding, L. Y. Dong,M. Y. Dong,S. X. Du,J. Fang,S. S. Fang,L. Fava,F. Feldbauer,C. Q. Feng,R. B. Ferroli,C. D. Fu,J. L. Fu,Y. Gao,C. Geng,K. Goetzen,W. X. Gong,W. Gradl,M. Greco,M. H. Gu,Y. T. Gu,Y. H. Guan,A. Q. Guo,L. B. Guo,Y. P. Guo,Y. L. Han,F. A. Harris,K. L. He,M. He,Z. Y. He,T. Held,Y. K. Heng,Z. L. Hou,H. M. Hu,J. F. Hu,T. Hu,G. M. Huang,G. S. Huang,J. S. Huang,X. T. Huang,Y. P. Huang,T. Hussain,C. S. Ji,Q. Ji,Q. P. Ji,X. B. Ji,X. L. Ji,L. L. Jiang,X. S. Jiang,J. B. Jiao,Z. Jiao,D. P. Jin,S. Jin,F. F. Jing,N. Kalantar-Nayestanaki,M. Kavatsyuk,M. Kornicer,W. Kuehn,W. Lai,J. S. Lange,C. H. Li,Cheng Li,Cui Li,D. M. Li,F. Li,G. Li,H. B. Li,J. C. Li,K. Li,Lei Li, Q. J. Li,S. L. Li,W. D. Li,W. G. Li,X. L. Li,X. N. Li, X. Q. Li,X. R. Li,Z. B. Li,H. Liang,Y. F. Liang,Y. T. Liang,G. R. Liao,X. T. Liao,B. J. Liu,C. L. Liu,C. X. Liu,C. Y. Liu,F. H. Liu,Fang Liu,Feng Liu,H. Liu,H. H. Liu,H. M. Liu,H. W. Liu,J. P. Liu,K. Y. Liu,Kai Liu,P. L. Liu,Q. Liu,S. B. Liu,X. Liu,Y. B. Liu,Z. A. Liu,Zhiqiang Liu,Zhiqing Liu,H. Loehner,G. R. Lu,H. J. Lu,J. G. Lu,Q. W. Lu,X. R. Lu,Y. P. Lu,C. L. Luo,M. X. Luo,T. Luo,X. L. Luo,M. Lv,C. L. Ma,F. C. Ma,H. L. Ma,Q. M. Ma,S. Ma,T. Ma,X. Y. Ma,Y. Ma,F. E. Maas,M. Maggiora,Q. A. Malik,Y. J. Mao,Z. P. Mao,J. G. Messchendorp,J. Min,T. J. Min,R. E. Mitchell,X. H. Mo,C. Morales Morales,C. Motzko,N. Yu Muchnoi,H. Muramatsu,Y. Nefedov,C. Nicholson,I. B. Nikolaev,Z. Ning,S. L. Olsen,Q. Ouyang,S. Pacetti,J. W. Park,M. Pelizaeus,H. P. Peng,K. Peters,J. L. Ping,R. G. Ping,R. Poling,E. Prencipe,M. Qi,S. Qian,C. F. Qiao,X. S. Qin,Y. Qin,Z. H. Qin,J. F. Qiu,K. H. Rashid,G. Rong,X. D. Ruan,A. Sarantsev,B. D. Schaefer,J. Schulze,M. Shao,C. P. Shen,X. Y. Shen,H. Y. Sheng,M. R. Shepherd,X. Y. Song,S. Spataro,B. Spruck,D. H. Sun,G. X. Sun,J. F. Sun,S. S. Sun,Y. J. Sun,Y. Z. Sun,Z. J. Sun,Z. T. Sun,C. J. Tang,X. Tang,I. Tapan,E. H. Thorndike,D. Toth,M. Ullrich,G. S. Varner,B. Wang,B. Q. Wang,D. Wang,D. Y. Wang,K. Wang,L. L. Wang,L. S. Wang,M. Wang,P. Wang,P. L. Wang,Q. Wang,Q. J. Wang,S. G. Wang,X. L. Wang,Y. D. Wang,Y. F. Wang, Y. Q. Wang,Z. Wang,Z. G. Wang,Z. Y. Wang,D. H. Wei,J. B. Wei,P. Weidenkaff,Q. G. Wen,S. P. Wen,M. Werner,U. Wiedner,L. H. Wu,N. Wu,S. X. Wu,W. Wu,Z. Wu,L. G. Xia,Z. J. Xiao,Y. G. Xie,Q. L. Xiu,G. F. Xu,G. M. Xu,H. Xu,Q. J. Xu,X. P. Xu,Z. R. Xu,F. Xue,Z. Xue,L. Yan,W. B. Yan,Y. H. Yan,H. X. Yang,Y. Yang,Y. X. Yang,H. Ye,M. Ye,M. H. Ye,B. X. Yu,C. X. Yu,H. W. Yu,J. S. Yu,S. P. Yu,C. Z. Yuan,Y. Yuan,A. A. Zafar,A. Zallo,Y. Zeng,B. X. Zhang,B. Y. Zhang,C. Zhang,C. C. Zhang,D. H. Zhang,H. H. Zhang,H. Y. Zhang,J. Q. Zhang,J. W. Zhang,J. Y. Zhang,J. Z. Zhang,S. H. Zhang,X. J. Zhang,X. Y. Zhang,Y. Zhang,Y. H. Zhang,Y. S. Zhang,Z. P. Zhang,Z. Y. Zhang,G. Zhao,H. S. Zhao,J. W. Zhao,K. X. Zhao,Lei Zhao,Ling Zhao,M. G. Zhao,Q. Zhao,Q. Z. Zhao,S. J. Zhao,T. C. Zhao,X. H. Zhao,Y. B. Zhao,Z. G. Zhao,A. Zhemchugov,B. Zheng,J. P. Zheng,Y. H. Zheng,B. Zhong,J. Zhong,Z. Zhong,L. Zhou,X. K. Zhou,X. R. Zhou,C. Zhu,K. Zhu,K. J. Zhu,S. H. Zhu,X. L. Zhu,Y. C. Zhu,Y. M. Zhu,Y. S. Zhu,Z. A. Zhu,J. Zhuang,B. S. Zou,J. H. Zou

PHYSICAL REVIEW D（2013）

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摘要

Using a data sample of 2.25 x 10(8) J/psi events collected with the BESIII detector, we present the first observation of the decays of eta(c) mesons to Sigma(+)(Sigma) over bar (-) and (sic)(-)<((sic))over bar>(+) .The branching fractions are measured to be (2.11 +/- 0.28(stat) +/- 0.18(syst) +/- 0.50(PDG)) x 10(-3) and (0.89 +/- 0.16(stat) +/- 0.08(syst) +/- 0.21(PDG)) x 10(-3) for eta(c) -> Sigma(+)(Sigma) over bar (-) and (sic)(-)<((sic))over bar>(+) , respectively. These branching fractions provide important information on the helicity selection rule in charmonium- decay processes. DOI: 10.1103/PhysRevD.87.012003

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decay,sic-over,over-bar

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