2023/03/30 by Yuuki Hayashi, Go Mishima, Hayashi, Yuuki +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2303.17171
openalex publication_date 2023/03/30 · openalex created_date 2023/04/05 · openalex updated_date 2026/07/28
We determine |Vcb| from the inclusive semileptonic decay width of the B meson with the known N3LO perturbative coefficients for the first time in the MS mass scheme. We make use of a recently developed method, dual-space-renormalon-subtraction (DSRS) method, to separate and subtract the order Λ\rm QCD2/mb infrared renormalon. This allows us to perform the analysis accurately in the MS mass scheme, in which otherwise the perturbative series does not converge well up to the currently calculated perturbation order. Our result reads |Vcb|=0.0415 (+10-12), which is consistent with the previous results based on other mass schemes and showing an independent cross check of the current theoretical evaluation of the inclusive decay width.