Fit to Moments of Inclusive B->Xc lv and B-> Xs gamma Decay Distributions using Heavy Quark Expansions in the Kinetic Scheme

Abstract

We present a fit to measured moments of inclusive distributions in B->Xc lv and B-> Xs gamma decays to extract values for the CKM matrix element |Vcb|, the b- and c-quark masses, and higher order parameters that appear in the Heavy Quark Expansion. The fit is carried out using theoretical calculations in the kinetic scheme and includes moment measurements of the Babar, Belle, CDF, CLEO and DELPHI collaborations for which correlation matrices have been published. We find |Vcb| = (41.96 +- 0.23(exp) +- 0.35(HQE) +- 0.59(Gamma_SL)) 10^-3 and m_b = 4.590 +- 0.025(exp) +- 0.30(HQE) GeV where errors are experimental and theoretical respectively. We also derive values for the heavy quark distribution function parameters m_b and \mu_\pi^2 in different theoretical schemes that can be used as input for the determination of |Vub|.

Comments: 13 pages, 6 figures. v3: Fig 1+2 show absolute values for moments and fit rather than the difference. Updated some references. v2: Updated to include Belle photon moments and PDG 2005 lifetime. Included extrapolation factors for the BR(B->Xs gamma) to 1.6 Gev based on the HQE parameters from the fit and added an updated OPE expression for |Vub|