Measurement of the Inclusive Charmless Semileptonic Branching Ratio of B Mesons and Determination of |V_ub|
| dc.creator | Aubert, B. | |
| dc.date | 2003-07-23 | |
| dc.date.accessioned | 2026-07-07T12:02:01Z | |
| dc.date.available | 2026-07-07T12:02:01Z | |
| dc.description | We report a measurement of the inclusive charmless semileptonic branching fraction of B mesons in a sample of 89 million BBbar events recorded with the BABAR detector at the Y(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 B meson. The number of signal events is extracted from the hadronic mass distribution and is used to determine the ratio of branching fractions BR(B->Xulnu)/BR(B->Xlnu) = (2.06 +/-0.25(stat) +/-0.23(syst) +/-0.36(theo)) x 10^{-2}. Using the measured branching fraction for inclusive semileptonic B decays, we find BR(B->Xulnu) = (2.24 +/- 0.27(stat) +/- 0.26(syst) +/- 0.39(theo)) x 10^{-3} and derive the CKM matrix element |Vub| = (4.62 +/- 0.28(stat) +/- 0.27(syst) +/- 0.48 (theo)) x 10^{-3}. | |
| dc.description | Submitted to Phys. Rev. Lett | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0307062 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0307062 | |
| dc.identifier | Phys.Rev.Lett.92:071802,2004 | |
| dc.identifier | doi:10.1103/PhysRevLett.92.071802 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207297 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the Inclusive Charmless Semileptonic Branching Ratio of B Mesons and Determination of |V_ub| | |
| dc.type | text |