Eur Phys J C (2004) 33: s207-s209
https://doi.org/10.1140/epjcd/s2003-03-107-4

PS01 Heavy Flavour Physics

Inclusive semileptonic B decays at BABAR

Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309, USA

Received: 31 October 2003
Accepted: 10 November 2003
Published online: 26 November 2003

Abstract

We report updates on two analyses of inclusive semileptonic B decays based on a dataset of 89 million events recorded with the BABAR detector at the Υ(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 meson. In the first analysis, the measurement of the first and second moment of the hadronic mass distribution in Cabibbo-favored decays allows for the determination of the nonperturbative parameters and λ ₁ of Heavy Quark Effective Theory (HQET) and |V _cb |. In the second analysis, the hadronic mass distribution is used to measure the inclusive charmless semileptonic branching fraction and to determine |V _ub |.

PACS: 13.20.He Decays of beauty mesons – 12.39.Hg Heavy quark effective theory