Measurement of the inclusive semileptonic branching fraction of B mesons and |Vcb|

Kazuo Abe ,E Nakano,H Iwasaki,V Aulchenko,T Nakadaira,Y Unno,S Eidelman,T Matsuishi,R Kulasiri,M Tanaka,T Iijima,T Mori,K Suzuki,A Bay,K Sumisawa,B.G Cheon,Y Igarashi,S Stanič,T Matsumoto,G Leder,H Kichimi,Y Kawakami,G.N Taylor,S Matsumoto,V Eiges,Y Zheng,T Kawasaki,K Hara,N Katayama,S Kobayashi,Y.-J Kwon,C Schwanda,P Kapusta,E Won,H Aihara,M Danilov,T.H Kim,H Hayashii,T Hara,A Sugi,S Ogawa,Y Enari,Z Natkaniec,A Limosani,S Tokuda,K Trabelsi,C.W Park,Y Teramoto,W Mitaroff,M Akatsu,K Kinoshita,A Bondar,H Kawai,T Tsukamoto,B Shwartz,H Ozaki,M Bračko,S Suzuki,Y Watanabe,N Kawamura,H Shibuya,M Peters,F Mandl,F Handa,A Yamaguchi,I Higuchi,Y Choi,Byoung Sup Ahn,Y Nagasaka,J Yashima,Y Yuan,K Neichi,D Žontar,T Aushev,A Kuzmin,K Tamai,H Miyake,S Semenov,K Hanagaki,M.-Z Wang,J Tanaka,Y Yamashita,S Noguchi,R Itoh,A Drutskoy,H Ishino,K.S Park,H Miyata,I Adachi,A Ishikawa,W Ostrowicz,V Sidorov,K Miyabayashi,J Brodzicka,W.-S Hou,Heejong Kim,P Pakhlov,P Chang,M Tomoto,O Nitoh,T Okabe,Y Yusa,J.G Wang,K Inami,S.-C Hsu,F Fang,Y Mikami,T Tsuboyama,H Park,H.-C Huang,T Ohshima,T Sumiyoshi,F Takasaki,T Gershon,Y Asano,M Satapathy,Y Ushiroda,Y Hoshi,Y Yamada,H.J Kim,S.H Lee,J Kaneko,Y Sakai,H Sagawa,T Abe,K Ueno,K Yoshida,S Okuno,B Golob,K Gotow,S Uno,D Liventsev,C.H Wang,A Sugiyama,T Aso,C.C Zhang,I Bedny,M Yamauchi,K Rybicki,T Igaki,S Nishida,R.-S Lu,J Macnaughton,J Li,D.W Kim,O Schneider,T Nozaki,A Garmash,C Fukunaga,K Senyo,T Hokuue,M Nakao,N Tamura,P Krokovny,T Hojo,N Gabyshev,G Majumder,V Zhilich,Z.P Zhang,H.O Kim,Y Ban,N Root,M Hazumi,S.K Kim,S Uehara,T Tomura,A Satpathy,H Sakamoto,H Kakuno,Y Miyabayashi,T Higuchi,F Ohno,J Zhang,R Chistov,T Nagamine,C.C Wang,A Bożek ,J S Kang ,J W Nam ,R S Guo ,S L Olsen ,B C.k Casey ,F J Ronga ,L E Piilonen ,Sanjeev Kumar ,B D Yabsley ,M E Sevior ,T E Browder ,S K Swain ,N C Hastings ,J P Perroud ,Hyun Woo Kim ,Y Chào ,H K Jang ,Tohru Takahashi ,E M Heenan ,P K Behera ,A M Bakich ,K E Varvell ,L Y Dong ,M Iwasaki ,Z Zhu ,J Lange ,Shoji Suzuki ,E Banaś ,Megumi Shimoyama ,H Pałka ,J H Kang ,S U Kataoka ,S Choi ,S N Tovey ,Saburou Saitoh ,G R Moloney ,Jagbir Singh ,S Hou ,L S Peak

doi:10.1016/s0370-2693(02)02770-3

Measurement of the inclusive semileptonic branching fraction of B mesons and |Vcb|

Kazuo Abe , E Nakano + Show 214 more

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https://doi.org/10.1016/s0370-2693(02)02770-3

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#Belle Detector #Decay Electrons + Show 8 more

Abstract
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Abstract

We present a measurement of the electron spectrum from inclusive semileptonic B decay, using 5.1 fb−1 of ϒ(4S) data collected with the Belle detector. A high-momentum lepton tag was used to separate the semileptonic B decay electrons from secondary decay electrons. We obtained the branching fraction, B(B→Xe+ν)=(10.90±0.12±0.49)%, with minimal model dependence. From this measurement, we derive a value for the Cabibbo–Kobayashi–Maskawa matrix element |Vcb|=0.0408±0.0010(exp)±0.0025(th).

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