Precision Determination of the Cabibbo-Kobayashi-Maskawa ElementVcb

2014/11/30 by Andrea Alberti, Paolo Gambino, Kristopher J. Healey +1 · 1 citation
Engineering · Mathematics · Physics and Astronomy · #Combinatorics #Electromagnetic Compatibility and Measurements #Mathematics #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Physics #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevlett.114.061802

published as Phys. Rev. Lett. 114, 061802 (2015) · 5 pages, v2: minor changes, matches journal version

arxiv created 2015/01/31 · openalex publication_date 2015/02/11 · arxiv updated 2015/03/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

Abstract

We extract the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element V_cb and the most relevant parameters of the heavy quark expansion from data of inclusive semileptonic B decays. Our calculation includes the recently computed O(\ensuremathα_s\mathrm\ensuremathΛ_QCD²/m_b²) corrections and a careful estimate of the residual theoretical uncertainty. Using a recent determination of the charm quark mass, we obtain |V_cb|=(42.21\ifmmode±\else\textpm\fi0.78)\ifmmode×\else\texttimes\fi10^\ensuremath-3 and m_b^kin(1 GeV)=(4.553\ifmmode±\else\textpm\fi0.020) GeV.

Citations

• Update of|Vcb|from theB¯→D*ℓν¯form factor at zero recoil with three-flavor lattice QCD
• Higher order power corrections in inclusive B decays
• CP violation and the CKM matrix: assessing the impact of the asymmetric B factories
• The bottom-quark mass from non-relativistic sum rules at NNNLO
• Perturbative corrections to semileptonic b decay distributions
• Mass Effects in Muon and Semileptonicb→cDecays
• Inclusive semileptonicBand polarizedΛbdecays from QCD
• Two-loop electroweak corrections for theK→πνν¯decays
• Global analysis of inclusiveBdecays
• CP-Violation in the Renormalizable Theory of Weak Interaction
• Kinetic operator effects in B¯→Xcℓν at O(αs)

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