Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2006-12-11
Phys.Rev.Lett.98:091801,2007
Physics
High Energy Physics
High Energy Physics - Experiment
9 pages (including a 2-pages EPAPS), 2 postscript figures, submitted to Phys.Rev.Lett
Scientific paper
10.1103/PhysRevLett.98.091801
We report the results of a study of the exclusive charmless semileptonic decay, B --> pi l nu, 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 decays are reconstructed with an innovative loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q2, the momentum transfer squared, from which we extract the f+(q2) form-factor shape and the total branching fraction BF(B0 --> pi l nu) = (1.46 +- 0.07(stat) +- 0.08(syst)) x 10^-4. Based on a recent unquenched lattice QCD calculation of the form factor in the range q2 > 16 GeV^2, 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.
No associations
LandOfFree
Measurement of the B0 --> pi l nu Form-Factor Shape and Branching Fraction, and Determination of |Vub| with a Loose Neutrino Reconstruction Technique does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Measurement of the B0 --> pi l nu Form-Factor Shape and Branching Fraction, and Determination of |Vub| with a Loose Neutrino Reconstruction Technique, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the B0 --> pi l nu Form-Factor Shape and Branching Fraction, and Determination of |Vub| with a Loose Neutrino Reconstruction Technique will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-182991