ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2004, vol. 92, p. 718021-718027
Measurement of the Inclusive Charmless Semileptonic Branching Ratio of B Mesons and Determination of |Vub|
The charmless semileptonic branching fraction of B mesons in sample of 89 × 106 BB̄ pairs were collected at υ(4S) resonance. The reconstruction of decay of one B meson and identification of charged lepton from decay of other B meson was also determined. The branching ratio fractions were calculated by number of signal events and were extracted from mass distribution of hadronic system accompanied by lepton. The Cabibbo-Kobayashi-Maskawa matrix element was derived using measured branching fraction for inclusive semileptonic B decays.