Measurement of the branching ratios {psi}{sup {prime}}{r_arrow}e{sup +}e{sup {minus}}, {psi}{sup {prime}}{r_arrow}J/{psi}{pi}{pi}, and {psi}{sup {prime}}{r_arrow}J/{psi}{eta}

V. Bharadwaj,M. Church,A. Hahn,S. Hsueh,W. Marsh, J. Peoples,S. Pordes,P. A. Rapidis,S. Werkema,D. Bettoni,R. Calabrese,P. Dalpiaz,Pietro Dalpiaz,M. Fabbri,A. Gianoli,E. Luppi,M. Martini, F. Petrucci, M. Savrie,A. Buzzo, M. Macri, M. Marinelli,M. Pallavicini, S. Passaggio, C. Patrignani,M. G. Pia, E. Robutti, A. Santroni,J. Fast,K. Gollwitzer,M. Mandelkern,J. Schultz,A. Smith,M. F. Weber, G. Zioulas, D. Broemmelsiek,D. Dimitroyannis,C. M. Ginsburg,J. Marques, M. Masuzawa,R. E. Ray,J. Rosen, M. Sarmiento,K. K. Seth, S. Trokenheim,J. Zhao,T. A. Armstrong,M. Hasan, R. Lewis, A. M. Majewska,J. Reid,G. A. Smith,Y. Zhang, Cristina Biino,G. Borreani,A. Ceccucci, R. Cester,G. Govi,F. Marchetto,E. Menichetti, A. Migliori,R. Mussa,S. Palestini,Nadia Pastrone,G. Rinaudo, B. Roccuzzo, M. Sozzi

Physical Review D（1997）

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摘要

We have observed exclusive decays of the {psi}{sup {prime}} in an experiment where the {psi}{sup {prime}} is formed in antiproton-proton annihilations. We report the branching ratios {ital B}({psi}{sup {prime}}{r_arrow}e{sup +}e{sup {minus}})=(8.3{plus_minus}0.5{sub stat}{plus_minus}0.7{sub syst}){times}10{sup {minus}3}, {ital B}({psi}{sup {prime}}{r_arrow}J/{psi}{pi}{sup +}{pi}{sup {minus}})=0.283{plus_minus}0.021{sub stat}{plus_minus}0.020{sub syst}, {ital B}({psi}{sup {prime}}{r_arrow}J/{psi}{pi}{sup 0}{pi}{sup 0})=0.184{plus_minus}0.019{sub stat}{plus_minus}0.013{sub syst}, {ital B}({psi}{sup {prime}}{r_arrow}J/{psi}{eta})=0.032{plus_minus}0.010{sub stat}{plus_minus}0.002{sub syst}. {copyright} {ital 1997} {ital The American Physical Society}

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