Aubert, B;
Barate, R;
Bona, M;
Boutigny, D;
Couderc, F;
Karyotakis, Y;
Lees, JP;
... BaBar Collaborat; + view all
(2006)
Measurement of the B ->pi l nu branching fraction and determination of vertical bar V-ub vertical bar with tagged B mesons.
PHYS REV LETT
, 97
(21)
, Article 211801. 10.1103/PhysRevLett.97.211801.
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Abstract
We report a measurement of the B ->pi center dot nu branching fraction based on 211 fb(-1) of data collected with the BABAR detector. We use samples of B-0 and B+ mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay and combine the results assuming isospin symmetry to obtain B(B-0 ->pi(-)center dot(+)nu)=(1.33 +/- 0.17(stat)+/- 0.11(syst))x10(-4). We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar by combining the partial branching fractions measured in ranges of the momentum transfer squared and theoretical calculations of the form factor. Using a recent lattice QCD calculation, we find vertical bar V-ub vertical bar=(4.5 +/- 0.5(stat)+/- 0.3(syst)0.7/0.5(FF))x10(-3), where the last error is due to the normalization of the form factor.
| Type: | Article |
|---|---|
| Title: | Measurement of the B ->pi l nu branching fraction and determination of vertical bar V-ub vertical bar with tagged B mesons |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.97.211801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.97.211801 |
| Language: | English |
| Additional information: | © 2006 The American Physical Society |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1303812 |
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