Heavy Quark Parameters and Vcb from Spectral Moments in Semileptonic B Decays

Details Heavy Quark Parameters and Vcb from Spectral Moments in Semileptonic B Decays Heavy Quark Parameters and Vcb from Spectral Moments in Semileptonic B Decays

2002-10-23

arxiv.org/abs/hep-ph/0210319v1

ECONF C0304052:WG102,2003; Phys.Lett.B556:41-49,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 2 figures

Scientific paper

10.1016/S0370-2693(03)00042-X

We extract the heavy quark masses and non-perturbative parameters from the Delphi preliminary measurements of the first three moments of the charged lepton energy and hadronic mass distributions in semileptonic B decays, using a multi-parameter fit. We adopt two formalisms, one of which does not rely on a 1/mc expansion and makes use of running quark masses. The data are consistent and the level of accuracy of the experimental inputs largely determines the present sensitivity. The results allow to improve on the uncertainty in the extraction of Vcb.

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