2012/12/31 by Belle Collaboration, C. Oswald, P. Urquijo +182
Chemistry · Engineering · Physics and Astronomy · #B meson #Branching (polymer chemistry) #Branching fraction #Chemistry #Collider #Electron #Electron–positron annihilation #Hadron #KEKB #Lepton #Meson #Nuclear physics #Particle Accelerators and Free-Electron Lasers #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Semileptonic decay #hep-ex
paper · pdf · doi:10.1103/physrevd.87.072008
Updated results after correction of an error concerning semileptonic B_s decays in the Belle EvtGen installation. Details can be found in the attached Erratum
openalex publication_date 2013/04/30 · arxiv created 2014/10/02 · arxiv updated 2014/10/03 · openalex created_date 2017/02/17 · openalex updated_date 2026/08/05
We report a measurement of the inclusive semileptonic Bs0 branching fraction in a 121 fb^\ensuremath-1 data sample collected near the \ensuremathΥ(5S) resonance with the Belle detector at the KEKB asymmetric energy e+e^\ensuremath- collider. Events containing Bs0(*)Bs0(*) pairs are selected by reconstructing a tag side Ds+ and identifying a signal side lepton \ensuremathℓ+ (\ensuremathℓ=e, \ensuremathμ) that is required to have the same-sign charge to ensure that both originate from different Bs0 mesons. The Bs0\ensuremath→X^\ensuremath-\ensuremathℓ+\ensuremathν_\ensuremathℓ branching fraction is extracted from the ratio of the measured yields of Ds+ mesons and Ds+\ensuremathℓ+ pairs and the known production and branching fractions. The inclusive semileptonic branching fraction is measured to be [10.6\ifmmode±\else\textpm\fi0.5(stat)\ifmmode±\else\textpm\fi0.7(syst)]%.