Global analysis of inclusive B decays
Abstract
In light of the large amount of new experimental data, we revisit the determination of Vcb and mb from inclusive semileptonic and radiative B decays. We study shape variables to order lqcd3/mb3 and alphas2β0, and include the order alphas, lqcd/mb correction to the hadron mass spectrum in semileptonic decay, which improves the agreement with the data. We focus on the 1S and kinetic mass schemes for the b quark, with and without expanding mb-mc in HQET. We perform fits to all available data from BABAR, BELLE, CDF, CLEO, and DELPHI, discuss the theoretical uncertainties, and compare with earlier results. We find Vcb = (41.4 +- 0.6 +- 0.1) x 10-3 and mb1S = 4.68 +- 0.03 GeV, including our estimate of the theoretical uncertainty in the fit.
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