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Global analysis of inclusive B decays

Christian W. Bauer·Zoltan Ligeti·Michael Luke·Aneesh V. Manohar·Michael Trott
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Abstract

In light of the large amount of new experimental data, we revisit the determination of V_{cb} and m_b from inclusive semileptonic and radiative B decays. We study shape variables to order lqcd^3/m_b^3 and alpha_s^2β_0, and include the order alpha_s, lqcd/m_b 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 m_b-m_c 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 V_{cb} = (41.4 +- 0.6 +- 0.1) x 10^{-3} and m_b^{1S} = 4.68 +- 0.03 GeV, including our estimate of the theoretical uncertainty in the fit.

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Christian W. Bauer, Zoltan Ligeti, Michael Luke, Aneesh V. Manohar, Michael Trott. 2004-10-29. Global analysis of inclusive B decays. https://doi.org/10.1103/physrevd.70.094017

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