2002/08/13 by B. Aubert, D. Boutigny, J.-M. Gaillard +97 · 1 citation
Physics and Astronomy · #B meson #Branching fraction #Cabibbo–Kobayashi–Maskawa matrix #Electron #Electron–positron annihilation #Hadron #Lepton #Matrix element #Meson #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #Resonance (particle physics) #Semileptonic decay #hep-ex
paper · pdf · doi:10.1103/physrevd.67.031101
published as Phys.Rev.D67:031101,2003
arxiv created 2002/08/13 · openalex publication_date 2003/02/26 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
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 \ensuremathΥ(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(\stackrel\ensuremath→BXe\ensuremathν)=[10.87\ifmmode±\else\textpm\fi0.18(stat)\ifmmode±\else\textpm\fi0.30(syst)]%. Based on this measurement we determine the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |Vcb|.