2006/07/25 by The BABAR Collaboration, B. Aubert, Aubert, B.
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/0607060
25 pages, 9 postscript figures, submitted to ICHEP2006
arxiv created 2006/07/25 · openalex publication_date 2006/07/25 · arxiv updated 2009/12/01 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
We report the results of a study of the exclusive charmless semileptonic B0->pilnu decay undertaken with approximately 227 million BBbar pairs collected at the Upsilon(4S) resonance with the BABAR detector. The analysis uses events in which the signal B mesons are reconstructed with a novel loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q2, the l+nu invariant mass squared, from which we extract the f+(q2) form factor shape and the total branching fraction: BF(B0->pilnu) = (1.44 +- 0.08(stat) +- 0.10(syst))x 10-4. Based on a recent theoretical calculation of the form factor, we find the magnitude of the CKM matrix element |Vub| to be (4.1 +- 0.2(stat) +- 0.2(syst) +0.6-0.4(FF))x 10-3, where the last uncertainty is due to the normalization of the form factor.