1998/11/04 by André H. Hoang, Andre H. Hoang, Zoltan Ligeti +1 · 9 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.59.074017
published as Phys.Rev. D59 (1999) 074017 · 21 pages
arxiv created 1998/11/04 · openalex publication_date 1999/03/05 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
Theoretical predictions for B decay rates are rewritten in terms of the \ensuremathΥ(1S) meson mass instead of the b quark mass, using a modified perturbation expansion. The theoretical consistency of this expansion is shown both at low and high orders. Our method improves the behavior of the perturbation series for semileptonic and nonleptonic inclusive decay modes, as well as for exclusive decay form factors. The results are applied to the determination of the semileptonic B branching ratio, charm counting, the ratio of \stackrel\ensuremath→BX\ensuremathτ\ensuremathν and \stackrel\ensuremath→BXe\ensuremathν decay rates, and form factor ratios in \stackrel\ensuremath→BD*e\ensuremathν decay. We also comment on why it is not possible to separate perturbative and nonperturbative effects in QCD.