2002/02/12 by M. Beneke, Martin Beneke, G. Buchalla +6 · 99 citations
Mathematics · Physics and Astronomy · #B meson #Baryon #Gauge theory #Hadron #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Lattice gauge theory #Logarithm #Mathematical physics #Mathematics #Meson #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Renormalization #Renormalization group #hep-ph
paper · pdf · doi:10.1016/s0550-3213(02)00561-8
published in Nuclear Physics B 639(1-2), 389-407 (Elsevier BV) · 20 pages, LaTeX
arxiv created 2002/02/12 · openalex publication_date 2002/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We compute perturbative QCD corrections to the lifetime splitting between the charged and neutral B meson in the framework of the heavy quark expansion. These next-to-leading logarithmic corrections are necessary for a meaningful use of hadronic matrix elements of local operators from lattice gauge theory. We find the uncertainties associated with the choices of renormalization scale and scheme significantly reduced compared to the leading-order result. We include the full dependence on the charm-quark mass mc without any approximations. Using hadronic matrix elements estimated in the literature with lattice QCD we obtain τ(B+)/τ(B0d)=1.053± 0.027± 0.017, where the effects of unquenching and 1/mb corrections are not yet included. The lifetime difference of heavy baryons Ξ0b and Ξ-b is also briefly discussed.