Determination of |Vcb| and mb from Inclusive B -> Xc l nu and B -> Xs gamma Decays at Belle
Abstract
We present an analysis of the Belle measured moments of the lepton energy and hadronic mass spectra in B -> Xc l nu decays and the photon energy spectrum in B -> Xs gamma decays using theoretical expressions derived in the 1S and kinetic schemes. The magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb, the b-quark mass and other non-perturbative parameters are extracted. In the 1S scheme analysis we find |Vcb|=(41.49 +/- 0.52(fit) +/- 0.20(tauB)) x 10-3 and mb1S=(4.729 +/- 0.048) GeV. In the kinetic scheme, we obtain |Vcb|=(41.93 +/- 0.65(fit) +/- 0.07(alphas) +/- 0.63(th)) x 10-3 and mbkin=4.564 +/- 0.076(fit) +/- 0.003(alphas) GeV.
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