Spectra of prompt electrons from decays of [formula omitted] and [formula omitted] mesons and ratio of inclusive semielectronic branching fractions

T Okabe,S Suzuki,G Varner,W Ostrowicz,L Hinz,H Kawai,Y Enari,I Bedny,A Somov,M Bračko,E Nakano,M Starič,Y Iwasaki,S Banerjee,Y Ban,Y Asano,Z.P Zhang,A Ishikawa,M Akatsu,M.-Z Wang,T Uglov,K Inami,C.W Park,S Blyth,A Bondar,K Ueno,M Hazumi,A Bay,Y Choi,T Hokuue,W.T Chen,T Iijima,R Pestotnik,O Nitoh,A Imoto,O Schneider,J Zhang,M Nakao,R Itoh,P Krokovny,I Bizjak,S.E Lee,W.-S Hou,C.H Wang,D Žontar,L.M Zhang,S Uehara,T Hara,H Miyata,A Sugiyama,J Haba,W Mitaroff,S Okuno,B Golob,S Fratina,R Stamen,T Gershon,S Hou,D Mohapatra,A Yamaguchi,T Nagamine,R Seuster,Y Hoshi,N Soni,H Shibuya,M Danilov,P Koppenburg,Y Teramoto,H Kichimi,S Semenov,T Nozaki,K.-F Chen,J Macnaughton,J Brodzicka,K Kinoshita,S Uno,S.M Kim,S Korpar,S Eidelman,K Sumisawa,T Sumiyoshi,H Park,G Gokhroo,T Ohshima,S Nishida,T Aushev,J Ying,A Chen,M Dash,A Limosani,I Adachi,Y Yamashita,C.C Wang,N Tamura,P Kapusta,F Takasaki,N Gabyshev,H Sagawa,H.J Kim,T Kawasaki,N Parslow,V Eiges,M Watanabe,A Matyja,O Tajima,T Higuchi,R Chistov,K.S Park,H Miyake,A Drutskoy,T Schietinger,H Hayashii,J Dalseno,S.H Lee,A Go,G Majumder,Y Watanabe,T Tsukamoto,R Mizuk,Y Yusa,J Li,T Matsumoto,S Stanič,S Ogawa,D Liventsev,A Chuvikov,C Schwanda,M Tanaka,T Lesiak,H Aihara,K Hayasaka,F Mandl,J.H Kim,Y Sakai,V Zhilich,Z Natkaniec,J Schümann,S Cole,Y Nagasaka,M Yamauchi,U Bitenc,A Garmash,N Katayama,Kazuo Abe ,X C Tian ,S Choi ,K E Varvell ,Jagbir Singh ,J Lange ,T Sarangi ,Y Chào ,G R Moloney ,A Bożek ,A M Bakich ,T E Browder ,L E Piilonen ,M E Sevior ,C C Kuo ,H Pałka ,H X Yang ,M Różańska ,B G Cheon ,J H Kang ,S L Olsen ,J S Kang ,Y J Kwon ,S W Lin ,B D Yabsley

doi:10.1016/j.physletb.2005.03.060

Spectra of prompt electrons from decays of [formula omitted] and [formula omitted] mesons and ratio of inclusive semielectronic branching fractions

T Okabe, S Suzuki + Show 166 more

Open Access

https://doi.org/10.1016/j.physletb.2005.03.060

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Journal: Physics Letters B	Publication Date: Apr 1, 2005
Citations: 3	License type: cc-by

Affiliation: Nagoya University, Polish Academy of Sciences, École Polytechnique Fédérale de Lausanne, Chiba University, Budker Institute of Nuclear Physics, University of Cincinnati, University of Maribor, Osaka City University, Tata Institute of Fundamental Research, Peking University, University of Tsukuba, National Taiwan University, Sungkyunkwan University, Tokyo University of Agriculture and Technology, Nara Women's University, University of Ljubljana, Osaka University, Niigata University, Saga University, Kanagawa University, Virginia Tech, Tohoku University, Tohoku Gakuin University, Panjab University, Toho University, Austrian Academy of Sciences, Tokyo Metropolitan University, Kyungpook National University, National Central University, University of Sydney, The University of Tokyo, University of Melbourne, Tokyo Institute of Technology, Princeton University

#Asymmetric Collider #Belle Detector + Show 8 more

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Abstract

We present spectra of prompt electrons from decays of neutral and charged B mesons. The results are based on 140 fb−1 of data collected by the Belle detector on the ϒ(4S) resonance at the KEKB e+e− asymmetric collider. We tag ϒ(4S)→BB¯ events by reconstructing a B meson in one of several hadronic decay modes; the semileptonic decay of the other B meson is inferred from the presence of an identified electron. We obtain for charged and neutral B mesons the partial rates of semileptonic decay, to electrons with momentum greater than 0.6 GeV/c in the B rest frame, and their ratio b+/b0=1.08±0.05±0.02, where the first and second errors are statistical and systematic, respectively.

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