Measurement of theB-meson inclusive semileptonic branching fraction and electron-energy moments

A H Mahmood,M Dubrovin,S Mehrabyan,D L Kreinick,W Park,R Sia,M R Shepherd,N Lowrey,L Hsu,M Weinberger,B Gittelman,A Magerkurth,V Potlia,A Bornheim,G Bonvicini,P Skubic,B Sanghi,S W Gray,J J Thaler,P Naik,Z Metreveli,J B Thayer,D Cinabro,V Pavlunin,K W Edwards,R Mountain,J Kandaswamy,R Poling,B K Heltsley,H Stoeck,E H Thorndike,R A Briere,H Muramatsu,T E Coan,D Peterson,H Schwarthoff,L Breva-Newell,K K Seth,N Menaa,F Liu,C Gwon,I Danko,R Nandakumar,J Pivarski,R Ehrlich,D Riley,T Wilksen,D M Asner,K Y Gao,V Savinov,B I Eisenstein,D Urner,S Blusk,E I Shibata,V Boisvert,M Chasse,J E Duboscq,C Boulahouache,H Mahlke-Krüger,J Napolitano,D T Gong,J P Alexander,A J Sadoff,C S Park,M E Watkins,C J Stepaniak,D Cronin-Hennessy,I Karliner,K K Gan,G Tatishvili,D G Cassel,G S Adams,S E Csorna,S P Pappas,E Dambasuren,T K Pedlar,J Urheim,D L Hartill,R S Galik,C Sedlack,S B Athar,O Dorjkhaidav,E A Eckhart ,A Smith,M Artuso,J Butt,M Selen,James S Williams ,R Redjimi,P Zweber,D H Miller,L K Gibbons ,S Dytman ,T O Meyer,P Avery,J P Cummings,S Z Li,K Arms,I P J Shipsey,T Ferguson,J Ernst,T Skwarnicki,K Berkelman,D Besson,G P Chen,J Yelton,A Shapiro,H Severini,W Sun ,S Nam,J Haynes,G S Huang,A W Scott,J G Thayer,E Lipeles,K M Ecklund,Y Kubota,H Vogel,S Stone,Kevin Zhang,C D Jones,В Е Кузнецов ,A Tomaradze,J Muêller ,J C Wang,N Adam ,J R Patterson,Y S Gao,R Stroynowski,A J Weinstein,G D Gollin

doi:10.1103/physrevd.70.032003

Measurement of theB-meson inclusive semileptonic branching fraction and electron-energy moments

A H Mahmood, M Dubrovin + Show 129 more

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https://doi.org/10.1103/physrevd.70.032003

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Journal: Physical Review D	Publication Date: Aug 17, 2004
Citations: 38

Affiliation: Wayne State University, University of Pittsburgh, Cornell University, University of Rochester, Syracuse University, University of Illinois Urbana-Champaign, University of Florida, California Institute of Technology, University of Oklahoma, Purdue University West Lafayette, Northwestern University, McGill University, University of Minnesota, Carnegie Mellon University, Southern Methodist University, The Ohio State University, Rensselaer Polytechnic Institute, Vanderbilt University

#High-momentum Lepton #Semileptonic Decay + Show 8 more

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Abstract

We report a new measurement of the B-meson semileptonic decay momentum spectrum that has been made with a sample of 9.4/fb of electron-positron annihilation data collected with the CLEO II detector at the Y(4S) resonance. Electrons from primary semileptonic decays and secondary charm decays were separated by using charge and angular correlations in Y(4S) events with a high-momentum lepton and an additional electron. We determined the semileptonic branching fraction to be (10.91 +- 0.09 +- 0.24)% from the normalization of the electron-energy spectrum. We also measured the moments of the electron energy spectrum with minimum energies from 0.6 GeV to 1.5 GeV.

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