Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2004-02-22
Eur.Phys.J.C33:575,2004; Eur.Phys.J.C33:s207-s209,2004
Physics
High Energy Physics
High Energy Physics - Experiment
3 pages, 4 postscript figures, submitted to EPS 2003
Scientific paper
10.1140/epjcd/s2003-03-107-4
We report updates on two analyses of inclusive semileptonic B decays based on a dataset of 89 million BB events recorded with the BABAR detector at the Y(4S) resonance. Events are selected by fully reconstructing the decay of one B meson and identifying a charged lepton from the decay of the other B meson. In the first analysis, the measurement of the first and second moment of the hadronic mass distribution in Cabibbo-favored B ->X_c l nu decays allows for the determination of the nonperturbative parameters $\bar{\Lambda}$ and $\lambda_1$ of Heavy Quark Effective Theory (HQET) and |Vcb|. In the second analysis, the hadronic mass distribution is used to measure the inclusive charmless semileptonic branching fraction and to determine |Vub|.
for the BABAR Collaboration
Langenegger Urs
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