Measurement of the branching ratios psi'->e(+)e(-), psi'->J/psi pi pi, and psi'->J/psi eta RID C-5223-2009
T. A. Armstrong, D. Bettoni, Bharadwaj, Cristina Biino,Giorgio Borreani,D. Broemmelsiek, A. Buzzo,Roberto Calabrese,A. Ceccucci,R. Cester,M. Church,P. F. Dalpiaz,D. Dimitroyannis,M. Fabbri, James E. Fast,A. Gianoli,C. M. Ginsburg,K. E. Gollwitzer,G. Govi,A. Hahn, M. Hasan,S. Hsueh, Raymond A. Lewis,Eleonora Luppi,M. M. Macri,A. M. Majewska,M. Mandelkern,F. Marchetto,Mauro Marinelli,J. Marques,W. Marsh, M. Martini, M. Masuzawa,E. Menichetti,A. Migliori,R. Mussa,Sandro Palestini,Marco Pallavicini, S. Passaggio,Nadia Pastrone,C. Patrignani, John Peoples,Fabrizio Petrucci,M. G. Pia,S. Pordes,P. A. Rapidis,R. Ray,J. D. Reid,G. Rinaudo,Enrico Robutti, B. Roccuzzo,J. L. Rosen, A. Santroni,M. Sarmiento, M. Savrie, J. Schultz,K. K. Seth, A. J. S. Smith, G. A. Smith,Marco Stanislao Sozzi, S. Trokenheim,M. F. Weber,S. J. Werkema, Y. Zhang, J. Zhao,G. Zioulas Physical Review D（1997）
摘要
We have observed exclusive decays of the ψ′ in an experiment where the ψ′ is formed in antiproton-proton annihilations. We report the branching ratios B(ψ′→e+e−)=(8.3±0.5stat±0.7syst)×10−3, B(ψ′→J/ψπ+π−)=0.283±0.021stat±0.020syst, B(ψ′→J/ψπ0π0)=0.184±0.019stat±0.013syst, B(ψ′→J/ψη)=0.032±0.010stat±0.002syst. Received 3 September 1996DOI:https://doi.org/10.1103/PhysRevD.55.1153©1997 American Physical Society
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