Measurement Of The Branching Fraction For Inclusive Semileptonic B Meson Decays

B. Aubert, D. Boutigny,J.-M. Gaillard, A. Hicheur,Y. Karyotakis,J. P. Lees,P. Robbe,V. Tisserand,A. Zghiche,A. Palano, A. Pompili, J. C. Chen,N. D. Qi,G. Rong, P. Wang, Y. S. Zhu,G. Eigen,I. Ofte,B. Stugu,G. S. Abrams, A. W. Borgland,A. B. Breon, D. N. Brown,J. Button-Shafer,R. N. Cahn, E. Charles, M. S. Gill,A. V. Gritsan,Y. Groysman,R. G. Jacobsen,R. W. Kadel,J. Kadyk,L. T. Kerth,G. Kolomensky,J. F. Kral,C. LeClerc,M. E. Levi, G. Lynch,L. M. Mir,P. J. Oddone, T. J. Orimoto,M. Pripstein,N. A. Roe,A. Romosan,M. T. Ronan,V. G. Shelkov,A. V. Telnov,W. A. Wenzel,T. J. Harrison,C. M. Hawkes,D. J. Knowles,S. W. O'Neale,R. C. Penny, A. T. Watson,N. K. Watson,T. Deppermann,K. Goetzen, H. Koch,B. Lewandowski,K. Peters,H. Schmuecker, M. Steinke,N. R. Barlow,W. Bhimji, J. T. Boyd,N. Chevalier,P. J. Clark,W. N. Cottingham,C. Mackay,F. F. Wilson,K. Abe, C. Hearty,T. S. Mattison,J. A. McKenna,D. Thiessen,S. Jolly,A. K. McKemey,V. E. Blinov,A. D. Bukin,A. R. Buzykaev,V. B. Golubev,V. N. 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Waldi,T. Adye,N. De Groot,B. Franek,N. Geddes,G. Gopal,S. Xella,R. Aleksan,S. Emery,A. Gaidot,P.-F. Giraud,G. Hamel de Monchenault, W. Kozanecki,M. Langer,G. London,B. Mayer, G. Schott,B. Serfass, G. Vasseur,Ch. Yeche,M. Zito, M. Purohit, A. Weidemann,F. Yumiceva,I. Adam,D. Aston,N. Berger,A. Boyarski,M. Convery,D. Coupal,D. Dong, J. Dorfan,W. Dunwoodie, R. Field, T. Glanzman,S. Gowdy,E. Grauges,T. Haas,T. Hadig, V. Halyo,T. Himel,T. Hryn’ova,M. Huffer, W. Innes,C. Jessop,M. Kelsey, P. Kim,M. Kocian, U. Langenegger,D. Leith,S. Luitz, V. Luth,H. Lynch,H. Marsiske, S. Menke,R. Messner, D. Muller,C. O’Grady, V. Ozcan,A. Perazzo,M. Perl, S. Petrak,H. Quinn, B. Ratcliff,S. Robertson,A. Roodman, A. Salnikov,T. Schietinger,R. Schindler,J. Schwiening,G. Simi,A. Snyder, A. Soha, S. Spanier,J. Stelzer, D. Su,M. Sullivan,H. Tanaka,J. Va’vra,S. Wagner,M. Weaver,A. Weinstein,W. Wisniewski, D. Wright,C. Young, P. Burchat,C. Cheng,T. Meyer,C. Roat,R. Henderson,W. Bugg,H. Cohn,J. Izen,I. Kitayama,X. Lou,F. Bianchi,M. Bona,D. Gamba,L. Bosisio,G. Della Ricca,S. Dittongo,L. Lanceri,P. Poropat,L. Vitale,G. Vuagnin, R. Panvini,Sw. Banerjee,C. Brown,D. Fortin,P. Jackson,R. Kowalewski,J. Roney,H. Band, S. Dasu,M. Datta, A. Eichenbaum,H. Hu, J. Johnson,R. Liu,F. Di Lodovico, A. Mohapatra, Y. Pan,R. Prepost,I. Scott,S. Sekula,J. von Wimmersperg-Toeller,J. Wu, S. Wu,Z. Yu,H. Neal

PHYSICAL REVIEW D(2003)

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摘要
A largely model-independent measurement of the inclusive electron momentum spectrum and branching fraction for semileptonic decays of B mesons is presented based on data recorded at the Y(4S) resonance with the BABAR detector. Backgrounds from secondary charm decays are separated from prompt B decays using charge and angular correlations between the electron from one B meson and a high momentum electron tag from the second B meson. The resulting branching fraction is B(B-->Xenu)=[10.87+/-0.18(stat)+/-0.30(syst)]%. Based on this measurement we determine the Cabibbo-Kobayashi-Maskawa (CKM) matrix element \V-cb\.
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spectrum,biology,mathematics,physics,it,medicine,time reversal,apply
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