A largely model-independent measurement of the inclusive electron momentum spectrum and branching fraction for semileptonic decays of B mesons is presented based on data recorded at the Y(4S) resonance with the BABAR detector. Backgrounds from secondary charm decays are separated from prompt B decays using charge and angular correlations between the electron from one B meson and a high momentum electron tag from the second B meson. The resulting branching fraction is B(B-->Xenu)=[10.87+/-0.18(stat)+/-0.30(syst)]%. Based on this measurement we determine the Cabibbo-Kobayashi-Maskawa (CKM) matrix element V-cb.

Measurement of the branching fraction for inclusive semileptonic B meson decays

FERRONI, Fernando
2003

Abstract

A largely model-independent measurement of the inclusive electron momentum spectrum and branching fraction for semileptonic decays of B mesons is presented based on data recorded at the Y(4S) resonance with the BABAR detector. Backgrounds from secondary charm decays are separated from prompt B decays using charge and angular correlations between the electron from one B meson and a high momentum electron tag from the second B meson. The resulting branching fraction is B(B-->Xenu)=[10.87+/-0.18(stat)+/-0.30(syst)]%. Based on this measurement we determine the Cabibbo-Kobayashi-Maskawa (CKM) matrix element V-cb.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12571/2713
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