1995/06/15 by Patricia Ball, Ball, Patricia
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9506337
6 pages, plain Latex (a4wide.sty and epsf.sty required). One postscript figure in uuencoded gzip format. To appear in the Proceedings of the XXXth Rencontres de Moriond, ``QCD and High Energy Hadronic Interactions'', Les Arcs, France, March 1995
arxiv created 1995/06/15 · arxiv updated 2009/11/30
We determine |Vcb| from inclusive semileptonic B decays including resummation of supposedly large perturbative corrections, which originate from the running of the strong coupling. We argue that the low value of the BLM scale found previously for inclusive decays is a manifestation of the renormalon divergence of the perturbative series starting already in third order. A reliable determination of |Vcb| from inclusive decays is still possible if one uses a short-distance b quark mass. We find that using the \rm MS running mass significantly reduces the perturbative coefficients already in low orders. For a semileptonic branching ratio of 10.9% we obtain |Vcb|(τB/1.50 \rm ps)1/2=0.041± 0.002± 0.002. This work was done in collaboration with M. Beneke and V.M. Braun.