Phys. Rev. Lett. 82, 277–280 (1999)B Decay and the ϒ MassReceived 18 September 1998; published in the issue dated 11 January 1999 Theoretical predictions for inclusive semileptonic B decay rates are rewritten in terms of the ϒ(1S) meson mass instead of the b quark mass, using a modified perturbation expansion. This method gives theoretically consistent and phenomenologically useful results. Perturbation theory is well behaved, and the largest theoretical error in the predictions coming from the uncertainty in the quark mass is eliminated. The results are applied to the determination of |Vcb|, |Vub|, and λ1. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.277
DOI:
10.1103/PhysRevLett.82.277
PACS:
13.20.He, 12.15.Hh, 12.38.Bx, 14.20.Mr
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