Branching Fraction for B0 -> pi- l+ nu and Determination of |Vub| in Upsilon(4S) -> B0 B0bar Events Tagged by B0bar -> D(*)+ l- nubar
| dc.creator | Aubert, B. | |
| dc.creator | Collaboration, BABAR | |
| dc.date | 2005-06-26 | |
| dc.date | 2005-07-01 | |
| dc.date.accessioned | 2026-07-07T03:36:57Z | |
| dc.date.available | 2026-07-07T03:36:57Z | |
| dc.description | We report preliminary results from a study of the charmless exclusive semileptonic decay B0 -> pi- l+ nu based on the data collected at the Upsilon(4S) resonance using the BABAR detector at SLAC. The analysis uses events in which the signal B meson recoils against a B meson that has been reconstructed in a semileptonic decay B0bar -> D(*)+ l- nubar. We extract the total branching fraction BF(B0 -> pi- l+ nu) = (1.03 +/- 0.25(stat.) +/- 0.13(syst.)) x 10^-4 and the partial branching fractions in three bins of q^2, the invariant mass squared of the lepton-neutrino system. From the partial branching fractions and theoretical predictions for the form factors, we determine the magnitude of the CKM matrix element |Vub|. We find |Vub| = (3.3 +/- 0.4(stat.) +/- 0.2(syst.) +0.8/-0.4(FF)) x 10^-3, where the last error is due to normalization of the form factor. | |
| dc.description | 20 pages, 4 figures, contributed to Lepton-Photon 2005; updated reference | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0506064 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0506064 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/37930 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Branching Fraction for B0 -> pi- l+ nu and Determination of |Vub| in Upsilon(4S) -> B0 B0bar Events Tagged by B0bar -> D(*)+ l- nubar | |
| dc.type | text |