Measurement of the branching fractions for psi(2S)-->e+e- and psi(2S)-->mu+mu-
B Aubert,D Boutigny,J M Gaillard,A Hicheur,Y Karyotakis,J P Lees,P Robbe,Tisserand,A Palano, A Pompili,G P Chen,J C Chen,N D Qi,G Rong,Peng Wang,Y S Zhu,G Eigen, P L Reinertsen, G Stugu,G S Abrams, A W Borgland,A B Breon,D N Brown, J Buttonshafer,R N Cahn,A R Clark,Gill, A V Gritsan,Y Groysman,R G Jacobsen,R W Kadel,J Kadyk,L T Kerth, Yu G Kolomensky,J F Kral,C Leclerc,M E Levi,Tao Liu,G Lynch,P J Oddone,A Perazzo,M Pripstein,N A Roe,A Romosan,M T Ronan,V G Shelkov,A V Telnov,W A Wenzel,P Brightthomas,T J Harrison, C M Hawkes,D J Knowles,S W Oneale,R C Penny, A T Watson,N K Watson,T Deppermann,K Goetzen,H Koch,M Kunze,B Lewandowski, K Peters,H Schmuecker, M Steinke,J C Andress,N R Barlow, W Bhimji,N Chevalier,Richard Clark,W N Cottingham,N De Groot,N Dyce, B Foster,J D Mcfall,D Wallom, F F Wilson,K Abe, C Hearty,T S Mattison,J A Mckenna,D Thiessen,S Jolly,A K Mckemey,J Tinslay,V E Blinov,A D Bukin,D A Bukin,A R Buzykaev,V B Golubev,V N Ivanchenko,A A Korol,E A Kravchenko,A P Onuchin,A 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Dickopp,R S Dubitzky,A Hauke,E Maly, R Mullerpfefferkorn,S Otto,K R Schubert, R Schwierz,B Spaan,L Wilden, D Bernard,G R Bonneaud,F Brochard, J Cohentanugi, S Ferrag,E Roussot, S Tjampens,Ch Thiebaux,G Vasileiadis,M Verderi,A Anjomshoaa,R Bernet, A Khan,D Lavin, F Muheim,S Playfer,J E Swain,M Falbo,C Borean, C Bozzi,S Dittongo,L Piemontese,E Treadwell, F Anulli,R Baldiniferroli,A Calcaterra,R De Sangro,D Falciai, G Finocchiaro,P Patteri,I M Peruzzi,M Piccolo,Yuan Xie, A Zallo,S Bagnasco,A Buzzo,R Contri, G Crosetti,M Lo Vetere,M Macri, Monge, S Passaggio, F Pastore,C Patrignani,M G Pia,E Robutti,A Santroni,M Morii, R Bartoldus,Ronald L Hamilton,U Mallik, J Cochran,H B Crawley,Peter Fischer,J W Lamsa, W T Meyer,E I Rosenberg,G Grosdidier,C Hast, A Hocker, H M Lacker, S Laplace, Lepeltier,A M Lutz, S Plasczcynski,M H Schune, S Trincazduvoid,G Wormser,R M Bionta, Brigljevic,D J Lange,M Mugge,K Van Bibber, Miles W Carroll, Fry, E Gabathuler,R Gamet,M George,M Kay,D J Payne,R J Sloane, C 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Langer,G W London,B Mayer,B Serfass, G Vasseur,C Yeche,M Zito,N Copty, M V Purohit, H B Singh, F Yumiceva,I Adam,P L Anthony,D Aston,K G Baird, N Berger, E D Bloom,A M Boyarski,F Bulos, G Calderini, Convery,D P Coupal,D H Coward, J Dorfan,W Dunwoodie,R C Field, T Glanzman,G Godfrey, S J Gowdy,P Grosso,T Haas,T Himel,T Hrynova,M E Huffer,W R Innes, C P Jessop,M H Kelsey, P Kim, M L Kocian, U Langenegger,Dwgs Leith,S Luitz, Luth,H L Lynch,H Marsiske, S Menke,R Messner,K C Moffeit,R Mount,Muller,C P Ogrady,M Perl,S Petrak,H Quinn,B N Ratcliff,S H Robertson,L S Rochester, A Roodman,T Schietinger, R H Schindler,J Schwiening,V V Serbo,A Snyder, A Soha,S M Spanier,J Stelzer, D Su,M K Sullivan,Hidekazu Tanaka, J Vavra, Wagner,Ajr Weinstein,W J Wisniewski,D H Wright, C C Young,P R Burchat,C H Cheng,D Kirkby,T I Meyer,C Roat,Robert Henderson,W Bugg,H O Cohn,A W Weidemann, J M Izen,I Kitayama,X C Lou,F Bianchi,M Bona,D Gamba,A Smol,L Bosisio,G Della Ricca,L Lanceri,P Poropat,G Vuagnin,R S Panvini,C M Brown, R Kowalewski, J M Roney, H R Band, E Charles, S Dasu,F Di Lodovico,A M Eichenbaum,H Hu,Runhui Liu, Y Pan,R Prepost,I J Scott, S J Sekula,J H Von Wimmerspergtoeller,S L Wu,Z Yu,T M B Kordich, H A Neal
PHYSICAL REVIEW D（2002）
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摘要
We measure the branching fractions of the psi(2S) meson to the leptonic final states e(+) e(-) and mu(+) mu(-) relative to that for psi(2S)-->J/psipi(+) pi(-). The method uses psi(2S) mesons produced in the decay of B mesons at the Y(4S) resonance in a data sample collected with the BABAR detector at the Stanford Linear Accelerator Center. Using previous measurements for the psi(2S)-->J/psipi(+) pi(-) branching fraction, we determine the e(+)e(-) and mu(+) mu(-) branching fractions to be 0.0078+/-0.0009+/-0.0008 and 0.0067+/-0.0008+/-0.0007, respectively.
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