Inclusive Semileptonic B Decays at BABAR

Abstract

The authors report updates on two analyses of inclusive semileptonic B decays based on a dataset of 89 million B{bar B} events recorded with the BABAR detector at the {Upsilon}(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 {bar B} meson. IN the first analysis, the measurement of the first and second moment of the hadronic mass distribution in Cabibbo-favored {bar B} {yields} X{sub c}{ell}{bar {nu}} decays allows for the determination of the nonperturbative parameters {bar {Lambda}} and {lambda}{sub 1} of Heavy Quark Effective Theory (HQET) and |V{sub cb}|. In the second analysis, the hadronic mass distribution is used to measure the inclusive charmless semileptonic branching fraction and to determine |V{sub ub}|.

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