Spectra of prompt electrons from decays of B and B0 mesons and ratio of inclusive semielectronic branching fractions

T Okabe; K Abe; K Abe; I Adachi; H Aihara; M Akatsu; Y Asano; T Aushev; AM Bakich; Y Ban; S Banerjee; A Bay; I Bedny; U Bitenc; I Bizjak; S Blyth; A Bondar; A Bozek; M Bračko; J Brodzicka; TE Browder; Y Chao; A Chen; KF Chen; WT Chen; BG Cheon; R Chistov; SK Choi; Y Choi; YK Choi; A Chuvikov; S Cole; J Dalseno; M Danilov; M Dash; A Drutskoy; S Eidelman; V Eiges; Y Enari; S Fratina; N Gabyshev; A Garmash; T Gershon; A Go; G Gokhroo; B Golob; J Haba; T Hara; K Hayasaka; H Hayashii; M Hazumi; T Higuchi; L Hinz; T Hokuue; Y Hoshi; S Hou; WS Hou; T Iijima; A Imoto; K Inami; A Ishikawa; R Itoh; Y Iwasaki; JH Kang; JS Kang; P Kapusta; N Katayama; H Kawai; T Kawasaki; H Kichimi; HJ Kim; JH Kim; SM Kim; K Kinoshita; P Koppenburg; S Korpar; P Krokovny; CC Kuo; YJ Kwon; JS Lange; SE Lee; SH Lee; T Lesiak; J Li; A Limosani; SW Lin; D Liventsev; J MacNaughton; G Majumder; F Mandl; T Matsumoto; A Matyja; W Mitaroff; H Miyake; H Miyata; R Mizuk; D Mohapatra; GR Moloney; T Nagamine; Y Nagasaka

Journal article

Spectra of prompt electrons from decays of B and B0 mesons and ratio of inclusive semielectronic branching fractions

T Okabe, K Abe, K Abe, I Adachi, H Aihara, M Akatsu, Y Asano, T Aushev, AM Bakich, Y Ban, S Banerjee, A Bay, I Bedny, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek, M Bračko, J Brodzicka Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER SCIENCE BV | Published : 2005

DOI: 10.1016/j.physletb.2005.03.060

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)→BB̄ 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. © 2005 Elsevi..

View full abstract