Measurement of the Branching Fraction for Inclusive Semileptonic B Meson Decays

Details Measurement of the Branching Fraction for Inclusive Semileptonic B Meson Decays Measurement of the Branching Fraction for Inclusive Semileptonic B Meson Decays

2002-08-13

arxiv.org/abs/hep-ex/0208018v1

Phys.Rev.D67:031101,2003

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1103/PhysRevD.67.031101

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 Upsilon(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 BR(B -> X e nu) = (10.87 +-0.18(stat)+-0.30(syst))%. Based on this measurement we determine the CKM matrix element |V_cb|.

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